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 8.9
XSS in Proliz's OBS
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Proliz Software Ltd. Co. OBS (Student Affairs Information System) allows Stored XSS. This issue affects OBS (Student Affairs Information System): befo…
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High 8.1CVE-2025-63307 Public exploit
alexusmai laravel-file-manager 3.3.1 is vulnerable to Cross Site Scripting (XSS). The application permits user-controll…
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High 7.1CVE-2025-63588 Public exploit
An unauthenticated reflected cross-site scripting vulnerability in the query handling of CMSimpleXH allows remote attac…
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High 7.1CVE-2025-63589 Public exploit
A reflected XSS vulnerability exists in CMSimple_XH 1.8's index.php router when attacker-controlled path segments are n…
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High 7.2
A Stored Cross-Site Scripting (XSS) vulnerability in the chat functionality of the SelfBest platform 2023.3 allows auth…
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High 8.7
LinkAce: Stored XSS Vulnerability in Link Title Field Through Social Media Sharing Feature
LinkAce is a self-hosted archive to collect website links. In versions 2.3.1 and below, the social media sharing functionality contains a Stored Cross-Site Scripting (XSS) vulnerability that allows any authenticated user to inject arbitrary JavaScript by crea…
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High 7.2
Footnotes Made Easy <= 3.0.7 - Unauthenticated Stored Cross-Site Scripting
The Footnotes Made Easy plugin for WordPress is vulnerable to Stored Cross-Site Scripting via plugin settings in all versions up to, and including, 3.0.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated at…
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High 7.1
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 26 and iPadOS 26,…
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High 7.1
Incorrect Content Type Cross-Site Scripting Vulnerability
IdentityIQ 8.5, IdentityIQ 8.4 and all 8.4 patch levels prior to 8.4p4, IdentityIQ 8.3 and all 8.3 patch levels including 8.3p5, and all prior versions allows some IdentityIQ web services that provide non-HTML content to be accessed via a URL path that will s…
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High 7.3CVE-2025-63441 Public exploit
Open Source Social Network (OSSN) 8.6 is vulnerable to Cross Site Scripting (XSS) via the parameter param` at endpoint …
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High 8.7CVE-2025-60503 Public exploit
A cross-site scripting (XSS) vulnerability exists in the administrative interface of ultimatefosters UltimatePOS 4.8 wh…
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High 7.2
Community Events <= 1.5.2 - Unauthenticated Stored Cross-Site Scripting
The Community Events plugin for WordPress is vulnerable to Stored Cross-Site Scripting via event details parameter in all versions up to, and including, 1.5.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticat…
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High 8.0
ELOG file upload stored XSS
ELOG allows an authenticated user to upload arbitrary HTML files. The HTML content is executed in the context of other users when they open the file. Because ELOG includes usernames and password hashes in certain HTTP requests, an attacker can obtain the targ…
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High 8.0
Statmatic vulnerable to Stored Cross-Site Scripting
Statmatic is a Laravel and Git powered content management system (CMS). Stored XSS vulnerabilities in Collections and Taxonomies allow authenticated users with content creation permissions to inject malicious JavaScript that executes when viewed by higher-pri…
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High 7.2
astro allows bypass of image proxy domain validation leading to SSRF and potential XSS
Astro is a web framework that includes an image proxy. In versions 5.13.4 and later before 5.13.10, the image proxy domain validation can be bypassed by using backslashes in the href parameter, allowing server-side requests to arbitrary URLs. This can lead to…
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High 7.1
Stored Cross-Site Scripting in Perx Customer Engagement & Loyalty Platform
Stored cross-site scripting (XSS) vulnerability in the LMT Dashboard of the Perx Customer Engagement & Loyalty Platform allows an authenticated attacker to execute arbitrary JavaScript code in a victim's browser. The vulnerability is due to improper sanitizat…
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High 7.2
Watu Quiz <= 3.4.4 - Unauthenticated Stored Cross-Site Scripting via HTTP Referer
The Watu Quiz plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the HTTP Referer header in versions less than, or equal to, 3.4.4 due to insufficient input sanitization and output escaping when the "Save source URL" option is enabled. This…
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High 8.1
Plane Vulnerable to Cross-Site Scripting via Open Redirect in ?next_path Parameter
Plane is open-source project management software. Prior to version 1.1.0, an open redirect vulnerability in the ?next_path query parameter allows attackers to supply arbitrary schemes (e.g., javascript:) that are passed directly to router.push. This results i…
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High 7.6
Reflected XSS in Proliz's OBS
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Proliz Software Ltd. Co. OBS (Student Affairs Information System) allows Reflected XSS. This issue affects OBS (Student Affairs Information System): b…
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High 7.1
WordPress VOD Infomaniak plugin <= 1.5.11 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Infomaniak Network VOD Infomaniak vod-infomaniak.This issue affects VOD Infomaniak: from n/a through <= 1.5.11.
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High 7.1
WordPress Simple Finance Calculator plugin <= 1.0 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in weissmike Simple Finance Calculator simple-finance-calculator allows Reflected XSS.This issue affects Simple Finance Calculator: from n/a through <= 1.0.
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High 7.1
WordPress WorkScout-Core plugin < 1.7.06 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in purethemes WorkScout-Core workscout-core allows Reflected XSS.This issue affects WorkScout-Core: from n/a through < 1.7.06.
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High 7.1
WordPress WC Return products plugin <= 1.5 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in pco_58 WC Return products wc-return-product allows Reflected XSS.This issue affects WC Return products: from n/a through <= 1.5.
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High 7.1
WordPress Easy Woocommerce Customizer plugin <= 1.0.2 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in themebon Easy Woocommerce Customizer easy-woocommerce-customizer allows Reflected XSS.This issue affects Easy Woocommerce Customizer: from n/a through <= 1.0…
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High 7.1
WordPress Doctreat theme <= 1.6.7 - Cross Site Scripting (XSS) Vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in AmentoTech Doctreat doctreat allows Reflected XSS.This issue affects Doctreat: from n/a through <= 1.6.7.
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High 7.1
WordPress NEX-Forms LITE plugin < 8.2 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Basix NEX-Forms LITE nex-forms-lite allows Reflected XSS.This issue affects NEX-Forms LITE: from n/a through < 8.2.
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High 7.1
WordPress CF7 Auto Responder Addon plugin <= 2.4 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in kamleshyadav CF7 Auto Responder Addon CF7-autoresponder-addon allows DOM-Based XSS.This issue affects CF7 Auto Responder Addon: from n/a through <= 2.4.
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High 7.1
WordPress SEO Pyramid plugin <= 1.9.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Chibueze Okechukwu SEO Pyramid seo-pyramid allows Reflected XSS.This issue affects SEO Pyramid: from n/a through <= 1.9.8.
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High 7.1
WordPress WP Tactical Popup plugin <= 1.1 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Arevico WP Tactical Popup wp-tactical-popup allows Reflected XSS.This issue affects WP Tactical Popup: from n/a through <= 1.1.
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High 7.1
WordPress Author: Munzir plugin <= 0.9 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Munzir Author: Munzir myshouts-shoutbox allows Reflected XSS.This issue affects Author: Munzir: from n/a through <= 0.9.
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High 7.1
WordPress Likert Survey Master plugin <= 0.8.0.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bob Likert Survey Master likert-survey-master allows Reflected XSS.This issue affects Likert Survey Master: from n/a through <= 0.8.0.1.
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High 7.1
WordPress Triss theme <= 2.6 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in designthemes Triss triss allows Reflected XSS.This issue affects Triss: from n/a through <= 2.6.
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High 7.1
WordPress WhatsApp Chat for WordPress and WooCommerce plugin <= 1.2.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeWarriors WhatsApp Chat for WordPress and WooCommerce tw-whatsapp-chat-rotator allows Reflected XSS.This issue affects WhatsApp Chat for WordPress and Wo…
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High 7.1
WordPress WPLMS plugin <= 1.9.9.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in VibeThemes WPLMS wplms_plugin allows Reflected XSS.This issue affects WPLMS: from n/a through <= 1.9.9.8.
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High 7.1
WordPress Fidelo Snippet plugin <= 1.12 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Fidelo Software GmbH Fidelo Snippet thebing-snippet allows Reflected XSS.This issue affects Fidelo Snippet: from n/a through <= 1.12.
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High 7.1
WordPress Calendar Plus plugin <= 1.2.4 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in webjunk Calendar Plus calendar-plus allows Reflected XSS.This issue affects Calendar Plus: from n/a through <= 1.2.4.
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High 7.1
WordPress Grid Plus plugin <= 3.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in G5Theme Grid Plus grid-plus allows Reflected XSS.This issue affects Grid Plus: from n/a through <= 3.3.
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High 7.1
WordPress Woocommerce Envato Affiliates plugin <= 1.2.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in AA-Team Woocommerce Envato Affiliates wooenvato allows Reflected XSS.This issue affects Woocommerce Envato Affiliates: from n/a through <= 1.2.1.
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High 7.1
WordPress Toast Mobile Menu plugin <= 1.0.8 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Toast Plugins Toast Mobile Menu toast-responsive-menu allows Stored XSS.This issue affects Toast Mobile Menu: from n/a through <= 1.0.8.
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High 7.1
WordPress RockON DJ theme <= 3.3 - Reflected Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in kamleshyadav RockON DJ rockon allows Reflected XSS.This issue affects RockON DJ: from n/a through <= 3.3.