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
2,688 results · Clear filters · Feed
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Low 2.4
code-projects Assessment Management view-users.php cross site scripting
A weakness has been identified in code-projects Assessment Management 1.0. Affected by this issue is some unknown functionality of the file admin/view-users.php. Executing a manipulation of the argument User can lead to cross site scripting. The attack may be…
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Low —
Schema.org has cross-site scripting (XSS) via script break-out in toScript() output
Schema.org has a cross-site scripting (XSS) vulnerability via script break-out in toScript() output.
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Low 3.1
SeaweedFS < 4.30 - Cross-Origin Information Disclosure via Unvalidated JSONP callback Parameter
SeaweedFS before 4.30 reflects the callback query parameter verbatim into responses served with Content-Type application/javascript in the shared writeJson helper (weed/server/common.go), with no callback-name validation, no X-Content-Type-Options: nosniff he…
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Low 2.3
Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown. When syntax highlighting and full info-string forwarding (re…
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Low 3.5
SourceCodester Inventory Management System User Registration Endpoint users_handler.php cross site scripting
A vulnerability was detected in SourceCodester Inventory Management System 1.0. Impacted is an unknown function of the file /api/users_handler.php of the component User Registration Endpoint. Performing a manipulation of the argument full_name results in cros…
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Low 3.5
CodeAstro Complaint Management System Report addreport cross site scripting
A security flaw has been discovered in CodeAstro Complaint Management System 1.0. This issue affects some unknown processing of the file /report/addreport of the component Report Handler. Performing a manipulation of the argument Report Title results in cross…
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Low 3.5
code-projects Project Management System Mail Compose mail.php cross site scripting
A vulnerability has been found in code-projects Project Management System 1.0. This vulnerability affects unknown code of the file /mail.php of the component Mail Compose Page. Such manipulation leads to cross site scripting. The attack may be performed from …
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Low 3.4
Joomla Extension - getk2.org - Stored-XSS in K2 extension for Joomla < 2.26
A Joomla user with K2 "create item" rights (Author tier by default) can submit an article whose `embedVideo` POST field contains a raw `<script>` tag; K2 stores it verbatim and renders it unescaped to any visitor of the article page.
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Low 1.1
Stored Cross-Site Scripting in Canarytokens.org
Stored Cross-Site Scripting in the exposed AWS API key store of Thinkst Applied Research Canarytokens. Anonymous exploitation requires knowledge of a random identifier. This issue affects Canarytokens: from Docker tag sha-4116b92cb before sha-f5aa5c4e, from G…
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Low 2.5
Pi: Potential XSS in HTML session exports via Markdown URL sanitization bypass
Pi is a minimal terminal coding harness. From 0.74.0 until 0.78.1, Pi HTML exports render session Markdown into a static HTML file. It did not consistently reject unsafe Markdown link and image URL schemes. In versions with scheme filtering, C0 control charac…
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Low 2.3
Nuxt - Cross-Site Scripting via NoScript Component Slot Content
Nuxt before 4.4.7 (and the 3.x branch before 3.21.7) contains a cross-site scripting vulnerability in the NoScript component that writes slot content to innerHTML without escaping. Attackers can inject malicious scripts through untrusted data in NoScript slot…
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Low —
Sveltia CMS: Stored XSS in Markdown/RichText preview via unsandboxed same-origin iframe
### Impact A stored cross-site scripting (XSS) vulnerability affected the Markdown/RichText field preview renderer in Sveltia CMS. The DOMPurify sanitization configuration used for Markdown previews explicitly permitted `iframe` elements without enforcing a `…
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Low 3.5
pgAdmin 4: HTML injection in cloud verify_credentials / deploy endpoints via unsanitised SDK exception text
HTML injection in pgAdmin 4's cloud deployment module. The verify_credentials, deploy, regions, and update-server endpoints under /rds/, /azure/, /google/, and the top-level /cloud/ blueprint propagated AWS / Azure / Google SDK exception text — and the relate…
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Low 2.1
Reflected XSS in LMS
A Reflected Cross-Site Scripting (XSS) vulnerability exists in LMS (LAN Management System) before commit 9c5651b in the "dbrecover.php" and "netremap.php" modules where unsanitized GET parameters are directly embedded into HTML output. This allows an attacker…
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Low 2.4
Intelliants Subrion CMS Blocks Endpoint cross site scripting
A vulnerability has been found in Intelliants Subrion CMS up to 4.0.3. Affected by this issue is some unknown functionality of the component Blocks Endpoint. Such manipulation of the argument CSS class name leads to cross site scripting. The attack may be lau…
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Low 3.5
Agile Store Locator < 1.6.9 - Admin+ Stored XSS via logo_name
The Store Locator WordPress plugin before 1.6.9 does not sanitize and escape store logo metadata before storing it and outputting it on the Store Locator WordPress plugin before 1.6.9 admin page, allowing high-privileged users such as administrators to perfor…
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Low 3.5
CodeAstro Human Resource Management System Projects Management Add_Projects cross site scripting
A security flaw has been discovered in CodeAstro Human Resource Management System 1.0. This affects an unknown part of the file /Projects/Add_Projects of the component Projects Management Page. The manipulation of the argument protitle results in cross site s…
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Low 3.5
CodeAstro Human Resource Management System Dashboard add_tod cross site scripting
A vulnerability was identified in CodeAstro Human Resource Management System 1.0. Affected by this issue is some unknown functionality of the file /dashboard/add_tod of the component Dashboard Interface. The manipulation of the argument todo_data leads to cro…
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Low 2.1
Parse Server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose ext…
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Low 2.3
Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling shared-cache poisoning
Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, the /__nuxt_island/* endpoint acc…
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Low 0.4
PAN-OS: Stored Cross-Site Scripting (XSS) Vulnerability in the Web Interface
A cross-site scripting (XSS) vulnerability in Palo Alto Networks PAN-OS® software enables a malicious authenticated administrator to store a JavaScript payload using the web interface. This issue is applicable to PAN-OS software on PA-Series and VM-Series fir…
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Low 3.5
Agile Store Locator < 1.6.6 - Admin+ Stored XSS via map_style
The Store Locator WordPress plugin before 1.6.6 does not sanitize and escape one of its settings before storing it and outputting it on the Store Locator WordPress plugin before 1.6.6 admin page, allowing high-privileged users such as administrators to perfor…
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Low 3.5
Lazy Blocks < 4.3.0 - Admin+ Stored XSS via Custom Block Frontend HTML
The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with D…
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Low 2.1
TYPO3 HTML Sanitizer allows Cross-Site Scripting
When ALLOW_INSECURE_RAW_TEXT is enabled, whitespace-variant closing tags (e.g., </style\t>) are not recognized by the sanitizer but accepted by browsers as valid end tags, allowing subsequent content to escape sanitization. This allows bypassing the cross-sit…
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Low 3.5
imvks786 student_management_system add.php cross site scripting
A vulnerability was detected in imvks786 student_management_system up to 9599b560ad3c3b83e75d328b76bedcd489ef1f46. Affected by this issue is some unknown functionality of the file /add.php. The manipulation of the argument name/address/fname results in cross …
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Low 3.5
SourceCodester Inventory System header.php cross site scripting
A weakness has been identified in SourceCodester Inventory System 1.0. Affected by this issue is some unknown functionality of the file header.php. This manipulation causes cross site scripting. It is possible to initiate the attack remotely. The exploit has …
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Low 2.4
CodeAstro Human Resource Management System Notice Board Management All_notice cross site scripting
A vulnerability was identified in CodeAstro Human Resource Management System 1.0. Impacted is an unknown function of the file /notice/All_notice of the component Notice Board Management. Such manipulation of the argument Notice Title with the input <svg onloa…
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Low 2.4
SourceCodester Hospitals Patient Records Management System page room_types cross site scripting
A vulnerability was detected in SourceCodester Hospitals Patient Records Management System 1.0. This issue affects some unknown processing of the file /admin/?page=room_types. Performing a manipulation of the argument room results in cross site scripting. The…
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Low 2.4
FluentCMS Blocks Plugin blocks cross site scripting
A weakness has been identified in FluentCMS 0.0.5. The impacted element is an unknown function of the file /admin/blocks of the component Blocks Plugin. This manipulation causes cross site scripting. The attack may be initiated remotely. The exploit has been …
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Low 2.4
SourceCodester Ship Ferry Ticket Reservation System manage_user cross site scripting
A security vulnerability has been detected in SourceCodester Ship Ferry Ticket Reservation System 1.0. Impacted is an unknown function of the file /admin/?page=user/manage_user. The manipulation of the argument Username leads to cross site scripting. It is po…
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Low 3.5
1Panel-dev CordysCRM ModuleFormController ModuleFormService.java save cross site scripting
A security vulnerability has been detected in 1Panel-dev CordysCRM up to 1.4.1. This impacts the function Save of the file src/main/java/cn/cordys/crm/system/service/ModuleFormService.java of the component ModuleFormController. The manipulation of the argumen…
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Low 2.4
westboy CicadasCMS Task Scheduling Management ScheduleJobController.java cross site scripting
A weakness has been identified in westboy CicadasCMS up to 2431154dac8d0735e04f1fd2a3c3556668fc8dab. Impacted is an unknown function of the file src/main/java/com/zhiliao/module/web/system/ScheduleJobController.java of the component Task Scheduling Management…
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Low 2.4
1Panel-dev CordysCRM RequestParamTrimConfig.java cross site scripting
A vulnerability has been found in 1Panel-dev CordysCRM up to 1.6.2. This affects an unknown function of the file backend/framework/src/main/java/cn/cordys/config/RequestParamTrimConfig.java. The manipulation leads to cross site scripting. Remote exploitation …
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Low 3.5
SourceCodester Pharmacy Sales and Inventory System main create_generic_name cross site scripting
A vulnerability was found in SourceCodester Pharmacy Sales and Inventory System 1.0. This vulnerability affects the function create_generic_name of the file /ShowForm/create_generic_name/main. The manipulation of the argument generic_name results in cross sit…
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Low 3.5
SourceCodester Pharmacy Sales and Inventory System main create_medicine_presentation cross site scripting
A vulnerability has been found in SourceCodester Pharmacy Sales and Inventory System 1.0. This affects the function create_medicine_presentation of the file /ShowForm/create_medicine_presentation/main. The manipulation of the argument medicine_presentation le…
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Low 3.5
SourceCodester Pharmacy Sales and Inventory System main create_supplier cross site scripting
A flaw has been found in SourceCodester Pharmacy Sales and Inventory System 1.0. Affected by this issue is the function create_supplier of the file /ShowForm/create_supplier/main. Executing a manipulation of the argument company_name can lead to cross site sc…
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Low 3.5
SourceCodester Pharmacy Sales and Inventory System main create_medicine_name cross site scripting
A vulnerability was detected in SourceCodester Pharmacy Sales and Inventory System 1.0. Affected by this vulnerability is the function create_medicine_name of the file /ShowForm/create_medicine_name/main. Performing a manipulation of the argument medicine_nam…
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Low 3.5
Mettle sendportal Campaign webview cross site scripting
A vulnerability was detected in Mettle sendportal up to 3.0.1. This affects an unknown part of the file /webview/ of the component Campaign Handler. The manipulation of the argument content results in cross site scripting. The attack can be launched remotely.…
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Low 3.5
raisulislamg4 student_management_system_by_php admission_form_check.php cross site scripting
A vulnerability was found in raisulislamg4 student_management_system_by_php up to 310d950e09013d5133c6b9210aff9444382d16d1. The impacted element is an unknown function of the file admission_form_check.php. The manipulation of the argument Message results in c…
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Low 2.4
sambitraj STUDENT-MANAGEMENT-SYSTEM Dashboard cross site scripting
A vulnerability has been found in sambitraj STUDENT-MANAGEMENT-SYSTEM 1.0. Affected is an unknown function of the component Dashboard Page. The manipulation of the argument Name leads to cross site scripting. It is possible to initiate the attack remotely. Th…