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
32,780 results · Feed
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Medium 5.4
QloApps through 1.7.0 Reflected XSS via Length of Stay Fields
QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor's length of stay fields. Attackers can induce authenticated administrators to submit crafted POST requests with malicious payloads in restriction…
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Medium 5.4
QloApps through 1.7.0 Reflected XSS via Room Type Editor
QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office room type editor that fails to escape room_num, floor, and comment field values in input attributes. Attackers can induce authenticated back-office users to submi…
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Medium 5.4
QloApps through 1.7.0 Reflected XSS via exceptions field
QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the exceptions field of the back-office Transplant a module form. Attackers can craft a malicious link containing JavaScript payload in the exceptions parameter that executes in …
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Medium 5.4
QloApps through 1.7.0 Reflected XSS via Book Now Search Parameters
QloApps through 1.7.0 contains a reflected cross-site scripting vulnerability in the back-office Hotel Reservation System Book Now search, where date_to and id_room_type parameters are copied into template variables without validation. Attackers can craft a m…
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Medium 6.1
AJA HELO Plus < 2.1.7 Stored XSS via System Name Parameter
AJA HELO Plus firmware before 2.1.7 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers with network access to inject malicious JavaScript by setting an unsanitized eParamID_SystemName value through the /config?action=se…
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High 8.1
Kiteworks Core Stored Cross-site Scripting (XSS)
A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an administrator holding only a single, narrowly scoped delegated permission to store crafted content that later executes arbitrary JavaScript in the authenticated session of a System …
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High 8.7
Kiteworks Core stored XSS
Kiteworks Core before version 9.5.0 is vulnerable to Stored Cross-Site Scripting. A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an authenticated user to submit content that, when later viewed by another user, executes arbitrary Ja…
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Critical 9.3
Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS)
A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an unauthenticated attacker to store crafted content that later executes arbitrary JavaScript in the authenticated session of an administrator who views the affected page. This could h…
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High 8.7
Kiteworks Core stored XSS
Kiteworks Core before version 9.5.0 is vulnerable to Stored Cross-site Scripting (XSS) that could allow an authenticated user to store crafted content that executes arbitrary JavaScript in another user's authenticated session when they preview shared content.…
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High 7.1
WordPress JetFormBuilder plugin <= 3.6.5.4 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in JetFormBuilder <= 3.6.5.4 versions.
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High 7.1
WordPress Branda plugin <= 3.4.32 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in Branda <= 3.4.32 versions.
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High 7.1
WordPress Post and Page Builder by BoldGrid plugin <= 1.27.14 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Post and Page Builder by BoldGrid <= 1.27.14 versions.
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High 7.1
WordPress Photonic Gallery & Lightbox for Flickr, SmugMug & Others plugin <= 3.36 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Photonic Gallery & Lightbox for Flickr, SmugMug & Others <= 3.36 versions.
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Medium 6.5
WordPress JetEngine plugin <= 3.8.15.3 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Crocoblock. Jetimpex Inc. JetEngine allows Stored XSS. This issue affects JetEngine: from n/a through 3.8.15.3.
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High 7.1
WordPress CURCY plugin 2.2.18 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in VillaTheme CURCY woo-multi-currency allows DOM-Based XSS.This issue affects CURCY: 2.2.18.
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Medium 6.9
In JetBrains YouTrack before 2026.2.19197 stored XSS in the workflow error notification toast was possible
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Medium 4.7
In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible
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Medium 6.2
MISP Stored Cross-Site Scripting via Unvalidated Galaxy Icon Field in Correlation Graph
MISP contains a stored cross-site scripting (XSS) vulnerability in the galaxy icon handling path. The icon field of a galaxy object was persisted without any server-side validation through the galaxy add, edit, and sync/import capture endpoints. The stored va…
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Medium 6.2
MISP Stored Cross-Site Scripting via JavaScript URL in Galaxy Cluster Source Field
MISP renders the source field of a Galaxy Cluster as a clickable hyperlink whenever the stored value passes PHP's FILTER_VALIDATE_URL validation. Because FILTER_VALIDATE_URL accepts the javascript: URI scheme, a user with galaxy editor privileges on the local…
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Medium 6.5
WordPress User Submitted Posts plugin <= 20260810 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jeff Starr User Submitted Posts allows Stored XSS. This issue affects User Submitted Posts: from n/a through 20260810.
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High 7.1
WordPress Popup by Supsystic plugin <= 1.13.1 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Popup by Supsystic <= 1.13.1 versions.
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High 7.1
WordPress Ultimate Maps by Supsystic plugin <= 1.5.5 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Ultimate Maps by Supsystic <= 1.5.5 versions.
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High 7.1
WordPress Easy Google Maps plugin <= 1.14.6 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Easy Google Maps <= 1.14.6 versions.
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Medium 6.5
WordPress WP Photo Album Plus plugin <= 9.3.02.003 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in WP Photo Album Plus <= 9.3.02.003 versions.
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High 7.1
WordPress Ninja Forms plugin <= 3.15.3 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Ninja Forms <= 3.15.3 versions.
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Medium 5.9
WordPress Supreme Modules Lite plugin <= 2.5.63 - Cross Site Scripting (XSS) vulnerability
Author Cross Site Scripting (XSS) in Supreme Modules Lite <= 2.5.63 versions.
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Medium 6.5
WordPress CF7 Views – Complete Entry Management for Contact Form 7 plugin <= 3.2.5 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in CF7 Views – Complete Entry Management for Contact Form 7 <= 3.2.5 versions.
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High 7.1
WordPress If-So Dynamic Content Personalization plugin <= 1.10.1 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in If-So Dynamic Content If-So Dynamic Content Personalization if-so allows Reflected XSS.This issue affects If-So Dynamic Content Personalization: from n/a thr…
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Medium 6.5
WordPress Cool Formkit Lite plugin <= 2.7.8 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in Cool Formkit Lite <= 2.7.8 versions.
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Medium 6.5
WordPress King Addons for Elementor plugin <= 51.1.86 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in King Addons for Elementor <= 51.1.86 versions.
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Medium 6.5
WordPress YITH WooCommerce Tab Manager plugin <= 2.15.0 - Cross Site Scripting (XSS) vulnerability
Author Cross Site Scripting (XSS) in YITH WooCommerce Tab Manager <= 2.15.0 versions.
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Medium 6.5
WordPress OAuth Server plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in OAuth Server <= 4.5.1 versions.
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High 7.1
WordPress Quiz And Survey Master plugin <= 11.2.6 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ExpressTech Quiz And Survey Master quiz-master-next allows DOM-Based XSS.This issue affects Quiz And Survey Master: from n/a through 11.2.6.
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Medium 6.5CVE-2026-97286 Public exploit
WordPress Strong Testimonials plugin <= 3.3.11 - Cross Site Scripting (XSS) vulnerability
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill Strong Testimonials strong-testimonials allows Stored XSS.This issue affects Strong Testimonials: from n/a through 3.3.11.
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Medium 6.5
WordPress Polylang plugin <= 3.8.9 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in Polylang <= 3.8.9 versions.
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High 7.1
WordPress WPFunnels plugin <= 3.13.1 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in WPFunnels <= 3.13.1 versions.
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High 7.1
WordPress Premmerce Permalink Manager for WooCommerce plugin <= 2.3.13 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in Premmerce Permalink Manager for WooCommerce <= 2.3.13 versions.
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Medium 6.5
WordPress CMB2 plugin <= 2.13.0 - Cross Site Scripting (XSS) vulnerability
Subscriber Cross Site Scripting (XSS) in CMB2 <= 2.13.0 versions.
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Medium 6.5
WordPress Visual Composer Website Builder plugin <= 45.16.2 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in Visual Composer Website Builder <= 45.16.2 versions.
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Medium 6.5
WordPress Virtue/Ascend/Pinnacle Toolkit plugin <= 4.9.12.1 - Cross Site Scripting (XSS) vulnerability
Contributor Cross Site Scripting (XSS) in Virtue/Ascend/Pinnacle Toolkit <= 4.9.12.1 versions.