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.
If the victim is an administrator, the attacker can also perform administrative actions. This issue is fixed in version 1.27.0.
Metrics
Affected Vendors & Products
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Mon, 29 Sep 2025 23:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
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. | |
Title | FreshRSS is vulnerable to XSS due to lack of CSP on HTML query page | |
Weaknesses | CWE-79 | |
References |
| |
Metrics |
cvssV3_1
|

Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-09-29T22:56:46.073Z
Reserved: 2025-09-23T14:33:49.506Z
Link: CVE-2025-59948

No data.

Status : Received
Published: 2025-09-29T23:15:32.467
Modified: 2025-09-29T23:15:32.467
Link: CVE-2025-59948

No data.

No data.