Weakness (CWE)
CWE-79: Cross-site Scripting
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
How to prevent it (8 mitigations)
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Architecture and Design
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
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Implementation, Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
- HTML body
- Element attributes (such as src="XYZ")
- URIs
- JavaScript sections
- Cascading Style Sheets and style property
etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
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Architecture and Design, Implementation
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.
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Implementation
Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
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Implementation
With Struts, write all data from form beans with the bean's filter attribute set to true.
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Implementation
To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.
Source: MITRE CWE-79
2,685 results · Clear filters · Feed
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Low 3.6
ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 Code Injection via MVG Encoder Drawing Options
ImageMagick before 6.9.13-58 and 7.x before 7.1.2-33 contains an injection vulnerability in the MVG encoder, which does not properly neutralize user-specified drawing options before writing them into generated MVG output. Attackers who can supply drawing opti…
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Low 3.5
Contact Form by Supsystic < 1.8.0 - Admin+ Stored XSS
The Contact Form by Supsystic WordPress plugin before 1.8.0 does not sanitise and escape a form name, allowing users with access to the form editor to inject arbitrary web scripts that execute when another user views the form. On multisite installations, wher…
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Low 3.5CVE-2026-116004 Public exploit
onyx-dot-app Onyx PreviewTab.tsx cross site scripting
A security vulnerability has been detected in onyx-dot-app Onyx up to 5.0.0. Impacted is an unknown function of the file web/src/app/craft/components/output-panel/PreviewTab.tsx. The manipulation leads to cross site scripting. The attack can be initiated remo…
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Low 2.4
phpIPAM index.php cross site scripting
A security vulnerability has been detected in phpIPAM up to 1.8.3. Affected by this vulnerability is an unknown functionality of the file upgrade/index.php. Such manipulation of the argument REQUEST_URI leads to cross site scripting. The attack may be launche…
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Low 2.1
Serialize JavaScript: Cross-site scripting (XSS) via unescaped </script at the end of a serialized function body
Serialize JavaScript serializes JavaScript values to a superset of JSON that includes regular expressions and functions. Prior to 7.1.3, the function-source escaping logic does not neutralize a bare closing-script prefix when attacker-influenced function sour…
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Low 3.5
Speed Optimizer < 7.8.5 - Admin+ Stored XSS via DNS Prefetch and Font Preload URL Lists
The Speed Optimizer WordPress plugin before 7.8.5 does not sanitise or escape some of its settings before outputting them in the head of front-end pages, which could allow high-privilege users such as admins to perform Stored Cross-Site Scripting attacks even…
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Low 2.4
gedelumbung HospitalManagement Settings sistem.php simpan cross site scripting
A vulnerability was identified in gedelumbung HospitalManagement up to c2d45543789a3887067d3915f69d44cfc2cf76a8. The affected element is the function sistem.php::simpan of the file application/modules/admin/controllers/sistem.php of the component Settings Han…
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Low 3.5
Vikunja 2.2.0 before 2.7.1 HTML Injection via Notification Email Header
Vikunja 2.2.0 before 2.7.1 contains an HTML injection vulnerability in CreateConversationalHeader in pkg/notifications/mail.go that interpolates display names and task and project titles raw into email anchors. Authenticated users can craft titles or display …
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Low 3.5
subhajitkhan online-clinic-management-system patdocmsg.php cross site scripting
A weakness has been identified in subhajitkhan online-clinic-management-system up to e9ee77a8827a1446220fa07ee693dc4d9a29a578. This affects an unknown part of the file patdocmsg.php. Executing a manipulation of the argument Query can lead to cross site script…
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Low 3.1
AI (Artificial Intelligence) - Moderately critical - Cross site scripting - SA-CONTRIB-2026-119
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal AI (Artificial Intelligence) allows Stored XSS. This issue affects AI (Artificial Intelligence) versions: from 0.0.0 to 1.3.13, from 1.4.0 to 1.4.8.
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Low 3.5
SAML SSO - Service Provider - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-146
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal SAML SSO - Service Provider allows Cross-Site Scripting (XSS). This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
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Low 3.3
SAML SSO - Service Provider - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-147
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal SAML SSO - Service Provider allows Cross-Site Scripting (XSS). This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
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Low 3.5
Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-154
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Webform allows Cross-Site Scripting (XSS). This issue affects Webform versions: from 0.0.0 to 6.2.12, from 6.3.0 to 6.3.1.
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Low 3.5
CookieCuttr - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-181
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal CookieCuttr allows Stored XSS. This issue affects CookieCuttr versions: from 2.0.0 to 2.0.3.
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Low 2.3
Nuxt: Incomplete fix for GHSA-934w-87qh-qr26: a `javascript:` URL prefixed with an ASCII control character executes from `<NuxtLink>` when `pages` is disabled
Nuxt is an open-source web development framework for Vue.js. Prior to 4.6.0, an incomplete fix for CVE-2026-53722 allows an application with pages disabled to render a script-capable URL through NuxtLink when attacker-controlled input bound to to is prefixed …
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Low 2.3
Astro: Arbitrary CSS injection in Astro View Transitions
Astro is a web framework for content-driven websites. From 7.1.0 until 7.3.3, Astro's server-side View Transition CSS generator does not keep string animation properties within their generated declarations. An application that passes attacker-controlled data …
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Low 3.7
ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)
ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From sanitize-html 2.17.7 until 2.18.0, an application configuration that permits namespace-prefixed SVG animation elements…
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Low 2.4
grandnode grandnode2 Product Description Product.Layout.Simple.cshtml Html.Raw cross site scripting
A vulnerability was detected in grandnode grandnode2 up to 2.3.0. Affected is the function Html.Raw of the file src/Web/Grand.Web/Views/Product/Product.Layout.Simple.cshtml of the component Product Description Handler. The manipulation results in cross site s…
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Low 3.5
SourceCodester Inventory System Sales Management transactions_handler.php save_sale cross site scripting
A vulnerability was found in SourceCodester Inventory System 1.0. This issue affects some unknown processing of the file /api/transactions_handler.php?action=save_sale of the component Sales Management Handler. The manipulation of the argument Hsn_Code result…
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Low 3.5
SourceCodester Inventory System Purchase Records transactions_handler.php save_purchase cross site scripting
A vulnerability has been found in SourceCodester Inventory System 1.0. This vulnerability affects unknown code of the file /api/transactions_handler.php?action=save_purchase of the component Purchase Records Handler. The manipulation of the argument Product_N…
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Low 3.5
SourceCodester Inventory System Product Management products_handler.php save cross site scripting
A flaw has been found in SourceCodester Inventory System 1.0. This affects an unknown part of the file /api/products_handler.php?action=save of the component Product Management. Executing a manipulation of the argument Product_Id/Product_Name can lead to cros…
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Low 3.5
diem-project diem dmWidget dmBaseLinkTag.php text cross site scripting
A security flaw has been discovered in diem-project diem up to 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. This issue affects the function dmBaseLinkTag::text of the file dmCorePlugin/lib/view/html/link/dmBaseLinkTag.php of the component dmWidget. Performing a …
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Low 2.4
diem-project diem Administrative Console actions.class.php append cross site scripting
A vulnerability was found in diem-project diem up to 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. Affected by this issue is the function append of the file dmAdminPlugin/modules/dmConsole/actions/actions.class.php of the component Administrative Console. The man…
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Low 2.4
diem-project diem Version Check Service dmAdminCtrl.js html cross site scripting
A vulnerability has been found in diem-project diem up to 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. Affected by this vulnerability is the function html of the file dmAdminPlugin/web/js/dmAdminCtrl.js of the component Version Check Service. The manipulation le…
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Low 3.5
Chamilo LMS Ticket TicketManager.php addProject cross site scripting
A vulnerability was determined in Chamilo LMS up to 1.11.40/2.0.3/3.0.1. This issue affects the function TicketManager::addProject of the file main/inc/lib/TicketManager.php of the component Ticket Module. Executing a manipulation of the argument Name can lea…
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Low 3.4
Coder before 2.34.2 Stored HTML Injection via Appearance Settings
Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a stored HTML injection vulnerability because the ApplicationName and LogoURL appearance settings are rendered into HTML output without sufficient escaping. At…
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Low 3.5
Helium: Stored XSS via Unrestricted SVG File Upload — Authenticated Users Can Store Executable Scripts
Helium is a free online student planner for classes, homework, grades, and notes. Prior to 2.2.60, the POST /planner/attachments/ endpoint allows authenticated users to upload SVG and HTML attachments because conf/configs/common.py omits those formats from BL…
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Low 3.5
EspoCRM: Stored XSS in wysiwyg template fields if CSP is disabled
EspoCRM is an open source customer relationship management application. Prior to 9.3.9, a user with Email Template or PDF Template edit permission can store crafted HTML that bypasses moderateSanitizeHtml(). When another user opens the template in edit mode a…
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Low 2.7
EspoCRM: Persistent XSS via CSP nonce injection in applicationName setting by admin user
EspoCRM is an open source customer relationship management application. Prior to 9.3.9, an authenticated administrator can place crafted content in the applicationName setting through CSP nonce injection. The persistent injection is inserted into the main app…
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Low 0.4
PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability
A stored cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store or execute a JavaScript payload using the web interface. The security risk posed by this issue is minimized when …
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Low 3.5
Gitea Jupyter notebook UI redress through CSS class injection
Gitea's Jupyter notebook renderer inserts the notebook's language_info.name metadata into a CSS class attribute while disabling sanitization and rendering directly in the main document without an iframe sandbox. A malicious repository notebook can supply mult…
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Low 3.5
philz1337x clarity-upscaler Extra Networks Card Rendering ui_extra_networks.py create_html_for_item cross site scripting
A security flaw has been discovered in philz1337x clarity-upscaler up to cfbdb842c6c839c8e97741722b8cf9a4b7662d98. This impacts the function create_html_for_item of the file modules/ui_extra_networks.py of the component Extra Networks Card Rendering. The mani…
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Low 2.4
Edimax BR-6208AC QoS Page formQoS cross site scripting
A security vulnerability has been detected in Edimax BR-6208AC 1.32. This affects an unknown part of the file /goform/formQoS of the component QoS Page. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. The exploi…
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Low 2.4
Edimax BR-6208AC Port Forwarding formPortFw cross site scripting
A weakness has been identified in Edimax BR-6208AC 1.32. Affected by this issue is some unknown functionality of the file /goform/formPortFw of the component Port Forwarding Page. Executing a manipulation can lead to cross site scripting. The attack may be pe…
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Low 2.4
Edimax BR-6208AC HTTP Blocking formUrlb cross site scripting
A security flaw has been discovered in Edimax BR-6208AC 1.32. Affected by this vulnerability is an unknown functionality of the file /goform/formUrlb of the component HTTP Blocking Page. Performing a manipulation results in cross site scripting. The attack is…
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Low 2.4
Edimax BR-6208AC formFilter cross site scripting
A vulnerability was identified in Edimax BR-6208AC 1.32. Affected is an unknown function of the file /goform/formFilter. Such manipulation leads to cross site scripting. The attack can be executed remotely. The exploit is publicly available and might be used.…
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Low 2.4
Netcore NR268 Web UI l7_call_board_user_set.cgi eval cross site scripting
A vulnerability was identified in Netcore NR268 1.7.121109. Affected by this vulnerability is the function eval of the file /router/l7_call_board_user_set.cgi of the component Web UI. Such manipulation of the argument title/note/URL/content leads to cross sit…
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Low 3.5
Netis WF2409E Wireless Settings cross site scripting
A vulnerability was detected in Netis WF2409E 3.3.42541. This affects an unknown function of the component Wireless Settings. The manipulation of the argument SSID results in cross site scripting. The attack may be performed from remote. The exploit is now pu…
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Low 3.5
idcCMS member_deal.php cross site scripting
A vulnerability has been found in idcCMS 1.70. Affected is an unknown function of the file admin/member_deal.php. The manipulation leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be use…
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Low 3.5
WP Job Openings < 4.0.0 - Admin+ Stored XSS
The HireZoot WordPress plugin before 4.0.0 does not sanitise and escape one of its job specification settings before it is reflected back into an admin-area settings page, allowing users with the HireZoot WordPress plugin before 4.0.0's management capability …