CVE-2025-59948
FreshRSS is vulnerable to XSS due to lack of CSP on HTML query page
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.
INFO
Published Date :
Sept. 29, 2025, 11:15 p.m.
Last Modified :
Oct. 3, 2025, 3:55 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update FreshRSS to version 1.27.0 or later.
- Disable 'Allow API access' if not needed.
- Implement Content Security Policy (CSP) headers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-59948.
| URL | Resource |
|---|---|
| https://github.com/FreshRSS/FreshRSS/commit/7df6c201f2e6a6521d20718dfd8d9794c7437d1f | Patch |
| https://github.com/FreshRSS/FreshRSS/releases/tag/1.27.0 | Release Notes |
| https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 | Exploit Vendor Advisory |
| https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-59948 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-59948
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-59948 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-59948 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 03, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:freshrss:freshrss:*:*:*:*:*:*:*:* versions up to (excluding) 1.27.0 Added Reference Type GitHub, Inc.: https://github.com/FreshRSS/FreshRSS/commit/7df6c201f2e6a6521d20718dfd8d9794c7437d1f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/FreshRSS/FreshRSS/releases/tag/1.27.0 Types: Release Notes Added Reference Type CISA-ADP: https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 30, 2025
Action Type Old Value New Value Added Reference https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9 -
New CVE Received by [email protected]
Sep. 29, 2025
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L Added CWE CWE-79 Added Reference https://github.com/FreshRSS/FreshRSS/commit/7df6c201f2e6a6521d20718dfd8d9794c7437d1f Added Reference https://github.com/FreshRSS/FreshRSS/releases/tag/1.27.0 Added Reference https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-rwhf-vjjx-gmm9