#xss

### Impact Since [v2.0.25](https://github.com/miniflux/v2/releases/tag/2.0.25), Miniflux will automatically [proxy](https://miniflux.app/docs/configuration.html#proxy-images) images served over HTTP to prevent mixed content errors. When an outbound request made by the Go HTTP client fails, the `html.ServerError` is [returned](https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L76) unescaped without the expected Content Security Policy [header](https://github.com/miniflux/v2/blob/b2fd84e0d376a3af6329b9bb2e772ce38a25c31c/ui/proxy.go#L90) added to valid responses. By creating an RSS feed item with the inline description containing an `<img>` tag with a `srcset` attribute pointing to an invalid URL like `http:a<script>alert(1)</script>`, we can coerce the proxy handler into an error condition where the invalid URL is returned unescaped and in full. This results in JavaScript execution on the Miniflux instance as soon as the user is convinced (e.g. ...

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-qwj6-q94f-8425. This link is maintained to preserve external references. ### Original Description Cross Site Scripting vulnerability in arnog MathLive Versions v0.103.0 and before (fixed in 0.104.0) allows an attacker to execute arbitrary code via the MathLive function.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS).This issue affects Drupal core: from 8.0.0 before 10.3.13, from 10.4.0 before 10.4.3, from 11.0.0 before 11.0.12, from 11.1.0 before 11.1.3.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Link field display mode formatter allows Cross-Site Scripting (XSS). This issue affects Link field display mode formatter: from 0.0.0 before 1.6.0.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Formatter Suite allows Cross-Site Scripting (XSS).This issue affects Formatter Suite: from 0.0.0 before 2.1.0.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal RapiDoc OAS Field Formatter allows Cross-Site Scripting (XSS). This issue affects RapiDoc OAS Field Formatter: from 0.0.0 before 1.0.1.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Google Tag allows Cross-Site Scripting (XSS). This issue affects Google Tag: from 0.0.0 before 1.8.0, from 2.0.0 before 2.0.8.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Ignition Error Pages allows Cross-Site Scripting (XSS). This issue affects Ignition Error Pages: from 0.0.0 before 1.0.4.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal SpamSpan filter allows Cross-Site Scripting (XSS). This issue affects SpamSpan filter: from 0.0.0 before 3.2.1.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS).This issue affects Drupal core: from 8.0.0 before 10.3.14, from 10.4.0 before 10.4.5, from 11.0.0 before 11.0.13, from 11.1.0 before 11.1.5.