CVE-2025-32015: FreshRSS vulnerable to Cross-site Scripting by embedding tag inside <iframe srcdoc>
Description
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.
Classification
CVE ID: CVE-2025-32015
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.7
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L
Problem Types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: FreshRSS
Product: FreshRSS
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 14.08% (scored less or equal to compared to others)
EPSS Date: 2025-06-19 (when was this score calculated)
Stakeholder-Specific Vulnerability Categorization (SSVC)
SSVC Exploitation: poc
SSVC Technical Impact: partial
SSVC Automatable: false
References
https://nvd.nist.gov/vuln/detail/CVE-2025-32015https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-wgrq-mcwc-8f8v
https://github.com/FreshRSS/FreshRSS/commit/54e2f9107d03c5b3bb260f38fdb2736bce449fd4