CVE-2021-47958

CVE-2021-47958 affects CouchCMS 2.2.1 and is a server-side request forgery via SVG upload. An authenticated attacker can upload SVG files containing external entity references through the browse.php endpoint to trigger arbitrary HTTP requests from the server, enabling access to internal services ...

EUVD-2026-30590

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to validate the response body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served from an attacker-controlled origin under a non-SVG Content-Type header e.g. image/png...

CVE-2026-4054 SVG content served through Mattermost image proxy despite Content-Type restrictions causes client-side denial of service

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to validate the response body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served from an attacker-controlled origin under a non-SVG Content-Type header e.g. image/png...

Cross-Site Scripting (XSS)

github.com/siyuan-note/siyuan is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to incomplete SVG sanitization and improper handling of user-controlled input in the /api/icon/getDynamicIcon endpoint, which allows an attacker to inject malicious SVG content and execute JavaScript...

CVE-2026-45314: Improper Neutralization of Alternate XSS Syntax

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the channel webhook create/update flow accepts arbitrary profileimageurl values, including data:image/svg+xml;base64,... payloads. The profile image endpoint then decodes and serves...

CVE-2026-45346: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.6.31, there is a Cross-Site Scripting vulnerability in Open WebUI SVG renderer implementation. This vulnerability is fixed in 0.6.31...

Open WebUI 安全漏洞

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted WebUI under open source. Versions of Open WebUI prior to 0.9.3 contained a security vulnerability. This vulnerability stemmed from the channel webhook creation/update process accepting arbitrary profileimageurl values,...

PT-2026-41349

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.5.0 through 11.5.1 Mattermost versions 10.11.0 through 10.11.13 Mattermost versions 11.4.0 through 11.4.3 Description Failure to validate the response body of proxied images allows a remote attacker to cause a client-sid...

Mattermost 代码问题漏洞

Mattermost is an open-source collaboration platform developed by the American company Mattermost. Versions of Mattermost such as 11.5.1 and earlier, 10.11.13 and earlier, as well as 11.4.3 and earlier, have code vulnerabilities. These vulnerabilities stem from unvalidated proxy image response...

CVE-2026-4054: Improper Check for Unusual or Exceptional Conditions

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13, 11.4.x = 11.4.3 Fail to validate the response body of proxied images, which allows a remote attacker to enact client-side DoS via an SVG file served from an attacker-controlled origin under a non-SVG Content-Type header e.g. image/png...

PT-2026-42650

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-whqh-9pq5-c7r3. This link is maintained to preserve external references. Original Description phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in SvgSanitizer::decodeAllEntities that...

CVE-2021-47958: Server-Side Request Forgery (SSRF)

CouchCMS 2.2.1 contains a server-side request forgery vulnerability that allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files. Attackers can upload SVG files containing external entity references through the browse.php endpoint to access internal service...

PT-2026-41362

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in SvgSanitizer::decodeAllEntities that limits recursive entity decoding to 5 iterations, allowing attackers to bypass sanitization. Authenticated users with FAQ EDIT permission can upload malicious SVG files with deeply...

CouchCMS 代码问题漏洞

CouchCMS is an open-source content management system CMS designed for designers. Version 2.2.1 of CouchCMS has a code vulnerability caused by server-side request forgeing issues. This vulnerability could allow authenticated attackers to initiate arbitrary HTTP requests by uploading malicious SVG...

Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_url

Summary When a user signs in via OAuth, Open WebUI fetches the picture claim URL, infers a MIME type from the URL extension via mimetypes.guesstype, and stores data:;base64,... as the user's profile image. The OAuth code path does not go through the validateprofileimageurl Pydantic validator that...

GHSA-3WGJ-C2HG-VM6Q Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_url

Summary When a user signs in via OAuth, Open WebUI fetches the picture claim URL, infers a MIME type from the URL extension via mimetypes.guesstype, and stores data:;base64,... as the user's profile image. The OAuth code path does not go through the validateprofileimageurl Pydantic validator that...

Cross-site Scripting (XSS)

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Cross-site Scripting XSS through the @html svg rendering path in the SVGPanZoom.svelte common component. An attacker can execute an arbitrary script in the browser by supplying a crafted SVG payload that is...

Open WebUI Has Stored Cross-Site Scripting in SVG Renderer

Summary There is a Cross-Site Scripting vulnerability in Open WebUI SVG renderer implementation. Details It is possible permanently save any HTML/JavaScript code in the application, which can be then executed in the context of the application domain. This behaviour can be used to extract and stea...

GHSA-3856-3VXQ-M6FC Open WebUI has XSS via SVG in /api/v1/channels/webhooks/{webhook_id}/profile/image

As part of our research on improving our AI pentest, we have uncovered the following issue in Open WebUI. We've manually verified and tided up the report, but you can also find the original agent finding at the bottom of this report. Summary The channel webhook create/update flow accepts arbitrar...

CVE-2026-22707 Strapi Upload Plugin MIME Validation Bypass via Content API

Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions plugin.upload.security.allowedTypes and deniedTypes. The same restrictions were correctly...