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
6,268 results · Clear filters · Feed
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High 7.1
WordPress Accordion Slider PRO plugin <= 1.2 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Accordion Slider PRO accordion_slider_pro allows Reflected XSS.This issue affects Accordion Slider PRO: from n/a through <= 1.2.
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High 7.1
WordPress Drone theme <= 1.40 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ApusTheme Drone drone allows Reflected XSS.This issue affects Drone: from n/a through <= 1.40.
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High 7.1
WordPress Magic Slider plugin <= 2.2 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Magic Slider magic_slider allows Reflected XSS.This issue affects Magic Slider: from n/a through <= 2.2.
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High 7.1
WordPress Image&Video FullScreen Background plugin <= 1.6.7 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Image&Video FullScreen Background lbg_fullscreen_fullwidth_slider allows Reflected XSS.This issue affects Image&Video FullScreen Background: fro…
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High 7.1
WordPress xPromoter plugin <= 1.3.4 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup xPromoter top_bar_promoter allows Reflected XSS.This issue affects xPromoter: from n/a through <= 1.3.4.
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High 7.1
WordPress Magic Responsive Slider and Carousel WordPress plugin <= 1.6 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup Magic Responsive Slider and Carousel WordPress magic_carousel allows Reflected XSS.This issue affects Magic Responsive Slider and Carousel WordP…
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High 7.1
WordPress Super Interactive Maps plugin <= 2.3 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in highwarden Super Interactive Maps super-interactive-maps allows Reflected XSS.This issue affects Super Interactive Maps: from n/a through <= 2.3.
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High 7.1
WordPress HTML5 Video Player with Playlist & Multiple Skins plugin <= 5.3.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup HTML5 Video Player with Playlist & Multiple Skins lbg-vp2-html5-rightside allows Reflected XSS.This issue affects HTML5 Video Player with Playli…
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High 7.1
WordPress HTML5 Video Player plugin <= 5.3.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in LambertGroup HTML5 Video Player lbg-vp2-html5-bottom allows Reflected XSS.This issue affects HTML5 Video Player: from n/a through <= 5.3.5.
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High 7.4
Typebot Vulnerable to Credential Theft via Client-Side Script Execution and API Authorization Bypass
Typebot is an open-source chatbot builder. In versions prior to 3.13.2, client-side script execution in Typebot allows stealing all stored credentials from any user. When a victim previews a malicious typebot by clicking "Run", JavaScript executes in their br…
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High 7.6
HTML Injection Leading to Script Execution in Altium Enterprise Server
HTML injection in Project Release in Altium Enterprise Server (AES) 7.0.3 on all platforms allows an authenticated attacker to execute arbitrary JavaScript in the victim’s browser via crafted HTML content.
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High 7.3
Argo Workflows affected by stored XSS in the artifact directory listing
Argo Workflows is an open source container-native workflow engine for orchestrating parallel jobs on Kubernetes. Prior to versions 3.6.17 and 3.7.8, stored XSS in the artifact directory listing allows any workflow author to execute arbitrary JavaScript in ano…
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High 8.5CVE-2026-23499 Public exploit
Saleor vulnerable to stored XSS via Unrestricted File Upload
Saleor is an e-commerce platform. Starting in version 3.0.0 and prior to versions 3.20.108, 3.21.43, and 3.22.27, Saleor allowed authenticated staff users or Apps to upload arbitrary files, including malicious HTML and SVG files containing Javascript. Dependi…
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High 7.2
VestaCP < 0.9.8-25 - Stored Cross-Site Scripting
VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add…
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High 7.2
Genexis Platinum-4410 P4410-V2-1.31A - 'start_addr' Persistent Cross-Site Scripting
Genexis Platinum-4410 P4410-V2-1.31A contains a stored cross-site scripting vulnerability in the 'start_addr' parameter of the Security Management interface. Attackers can inject malicious scripts through the start source address field that will persist and t…
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High 7.2
Moodle 3.10.3 - 'label' Persistent Cross Site Scripting
Moodle 3.10.3 contains a persistent cross-site scripting vulnerability in the calendar event subtitle field that allows attackers to inject malicious scripts. Attackers can craft a calendar event with malicious JavaScript in the subtitle track label to execut…
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High 7.2
Openlitespeed 1.7.9 - 'Notes' Stored Cross-Site Scripting
Openlitespeed 1.7.9 contains a stored cross-site scripting vulnerability in the dashboard's Notes parameter that allows administrators to inject malicious scripts. Attackers can craft a payload in the Notes field during listener configuration that will execut…
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High 7.2
NotificationX <= 3.2.0 - Unauthenticated DOM-Based Cross-Site Scripting via 'nx-preview'
The NotificationX – FOMO, Live Sales Notification, WooCommerce Sales Popup, GDPR, Social Proof, Announcement Banner & Floating Notification Bar plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting via the 'nx-preview' POST parameter in all ver…
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High 7.3
OnboardLite has stored Cross-site Scripting issue that may lead to admin Account Take Over
OnboardLite is a comprehensive membership lifecycle platform built for student organizations at the University of Central Florida. Versions of the software prior to commit 1d32081a66f21bcf41df1ecb672490b13f6e429f have a stored cross-site scripting vulnerabili…
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High 8.7
OpenProject has stored XSS regression using attachments and script-src self
OpenProject is an open-source, web-based project management software. Versions 16.3.0 through 16.6.4 are affected by a stored cross-site scripting vulnerability in the Roadmap view. OpenProject’s roadmap view renders the “Related work packages” list for each …
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High 8.5
Cross-site scripting (XSS) in OAuth Device Authorization screen
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in hexpm hexpm/hexpm ('Elixir.HexpmWeb.SharedAuthorizationView' modules) allows Cross-Site Scripting (XSS). This vulnerability is associated with program…
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High —
svelte is vulnerable to XSS with textarea bind:value
### Summary A server-side rendered `<textarea>` with two-way bound value does not have its value correctly escaped in the rendered HTML. ### Details In SSR, `<textarea bind:value={...}>` does not have its value escaped when it is rendered into the HTML as `<t…
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High 7.2
StudyMD 0.3.2 - Persistent Cross-Site Scripting
StudyMD 0.3.2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts into markdown files. Attackers can upload crafted markdown files with embedded JavaScript payloads that execute when the file is opened, p…
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High 7.2
Moeditor 0.2.0 - Persistent Cross-Site Scripting
Moeditor 0.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload specially crafted markdown files with embedded JavaScript that execute when opened, potential…
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High 7.2
Marky 0.0.1 - Persistent Cross-Site Scripting
Marky 0.0.1 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts into markdown files. Attackers can upload crafted markdown files with embedded JavaScript payloads that execute when the file is opened, pot…
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High 7.2
Markright 1.0 - Persistent Cross-Site Scripting
Markright 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to embed malicious payloads in markdown files. Attackers can upload specially crafted markdown files that execute arbitrary JavaScript when opened, potentially enabli…
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High 7.2
Markdownify 1.2.0 - Persistent Cross-Site Scripting
Markdownify 1.2.0 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads within markdown files. Attackers can upload crafted markdown files with embedded scripts that execute when the file is opened, potenti…
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High 7.2
Freeter 1.2.1 - Persistent Cross-Site Scripting
Freeter 1.2.1 contains a persistent cross-site scripting vulnerability that allows attackers to store malicious payloads in custom widget titles and files. Attackers can craft malicious files with embedded scripts that execute when victims interact with the a…
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High 8.7
Stored XSS in Time Entry Audit Trail
In ConnectWise PSA versions older than 2026.1, Time Entry notes stored in the Time Entry Audit Trail may be rendered without applying output encoding to certain content. Under specific conditions, this may allow stored script code to execute in the context of…
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High 7.2
In the portal in LemonLDAP::NG before 2.21.0, cross-site scripting (XSS) allows remote attackers to inject arbitrary we…
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High 8.0CVE-2026-1010 Public exploit
Stored Cross-Site Scripting in Altium Enterprise Server Workflow Engine Allows Privilege Escalation
A stored cross-site scripting (XSS) vulnerability exists in the Altium Workflow Engine due to missing server-side input sanitization in workflow form submission APIs. A regular authenticated user can inject arbitrary JavaScript into workflow data. When an adm…
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High 7.6
Stored Cross-Site Scripting in Altium Live User Profile Fields
A stored cross-site scripting (XSS) vulnerability exists in the user profile text fields of Altium 365. Insufficient server-side input sanitization allows authenticated users to inject arbitrary HTML and JavaScript payloads using whitespace-based attribute pa…
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High 8.7
LaSuite Doc affected by Stored XSS via Interlinking Block
LaSuite Doc is a collaborative note taking, wiki and documentation platform. From 3.8.0 to 4.3.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Interlinking feature. When a user creates a link to another document within the editor, the URL o…
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High 8.2
A vulnerability in the Multimedia Email component of Mitel MiContact Center Business through 10.2.0.10 and Mitel CX thr…
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High 7.7
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated user to execute stored cross-site scripting through improper input validation i…
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High 8.7
html2pdf.js has a cross-site scripting vulnerability
html2pdf.js converts any webpage or element into a printable PDF entirely client-side. Prior to 0.14.0, html2pdf.js contains a cross-site scripting (XSS) vulnerability when given a text source rather than an element. This text is not sufficiently sanitized be…
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High 7.2
GeekyBot — Generate AI Content Without Prompt, Chatbot and Lead Generation <= 1.1.8 - Unauthenticated Stored Cross-Site Scripting
The GeekyBot — Generate AI Content Without Prompt, Chatbot and Lead Generation plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the chat message field in all versions up to, and including, 1.1.8 due to insufficient input sanitization and …
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High 7.2
AJS Footnotes <= 1.0 - Unauthenticated Stored Cross-Site Scripting
The AJS Footnotes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'note_list_class' and 'popup_display_effect_in' parameters in all versions up to, and including, 1.0 due to missing authorization and nonce verification on settings sa…
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High 7.2
Name Directory <= 1.30.3 - Unauthenticated Stored Cross-Site Scripting via Multiple Parameters
The Name Directory plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name_directory_name' and 'name_directory_description' parameters in all versions up to, and including, 1.30.3 due to insufficient input sanitization and output escap…
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High 7.2
Mailhog 1.0.1 - Stored Cross-Site Scripting (XSS)
Mailhog 1.0.1 contains a stored cross-site scripting vulnerability that allows attackers to inject malicious scripts through email attachments. Attackers can send crafted emails with XSS payloads to execute arbitrary API calls, including message deletion and …