Vulnerability · Published Sep 29, 2025 · Assigned by GitHub_M

CVE-2025-59948FreshRSS is vulnerable to XSS due to lack of CSP on HTML query page

Medium 6.7

In plain English

A medium-severity cross-site scripting in FreshRSS from FreshRSS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)6.7Medium

Exploit odds (30 days)0.3%top 73.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreshRSS is a free, self-hostable RSS aggregator. Versions 1.26.3 and below do not sanitize certain event handler attributes in feed content, so by finding a page that renders feed entries without CSP, it is possible to execute an XSS payload. The Allow API access authentication setting needs to be enabled by the instance administrator beforehand for the attack to work as it relies on api/query.php. An account takeover is possible by sending a change password request via the XSS payload / setting UserJS for persistence / stealing the autofill password / displaying a phishing page with a spoofed URL using history.replaceState() If the victim is an administrator, the attacker can also perform administrative actions. This issue is fixed in version 1.27.0.

Affected products (as reported)

Vendor	Product	Versions
FreshRSS	FreshRSS	< 1.27.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L

References

https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 x_refsource_CONFIRM
https://github.com/FreshRSS/FreshRSS/commit/7df6c201f2e6a6521d20718dfd8d9794c7437d1f x_refsource_MISC
https://github.com/FreshRSS/FreshRSS/releases/tag/1.27.0 x_refsource_MISC