FreshRSS vulnerable to Cross-site Scripting by embedding <script> tag inside <iframe srcdoc>
Summary
FreshRSS vulnerable to Cross-site Scripting by embedding <script> tag inside <iframe srcdoc>
Original description
The description as published by the source.
FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, HTML is sanitized improperly inside the attribute, which leads to cross-site scripting (XSS) by loading an attacker's UserJS inside. In order to execute the attack, the attacker needs to control one of the victim's feeds and have an account on the FreshRSS instance that the victim is using. An attacker can gain access to the victim's account by exploiting this vulnerability. If the victim is an admin it would be possible to delete all users (cause damage) or execute arbitrary code on the server by modifying the update URL using fetch() via the XSS. Version 1.26.2 contains a patch for the issue.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com