CVE-2025-59948

MEDIUM
2025-09-29 [email protected]
6.7
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low

Lifecycle Timeline

4
Analysis Generated
Mar 28, 2026 - 19:14 vuln.today
Patch Released
Mar 28, 2026 - 19:14 nvd
Patch available
PoC Detected
Oct 03, 2025 - 15:55 vuln.today
Public exploit code
CVE Published
Sep 29, 2025 - 23:15 nvd
MEDIUM 6.7

Tags

PHP XSS Freshrss

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.

Analysis

FreshRSS is a free, self-hostable RSS aggregator. Rated medium severity (CVSS 6.7), this vulnerability is remotely exploitable. Public exploit code available.

Technical Context

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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 include: Freshrss. Version information: version 1.27.0..

Affected Products

Freshrss.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Priority Score

54
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +34
POC: +20

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CVE-2025-59948 vulnerability details – vuln.today
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