CVE-2025-31136
6.7 · MEDIUMOverview
CVE-2025-31136 is a medium-severity vulnerability affecting freshrss freshrss. It was published on June 4, 2025 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, it's possible to run arbitrary JavaScript on the feeds page.
This occurs by combining a cross-site scripting (XSS) issue that occurs in `f.php` when SVG favicons are downloaded from an attacker-controlled feed containing `<script>` tags inside of them that aren't sanitized, with the lack of CSP in `f.php` by embedding the malicious favicon in an iframe (that has `sandbox="allow-scripts allow-same-origin"` set as its attribute). An attacker needs to control one of the feeds that the victim is subscribed to, and also must have an account on the FreshRSS instance. Other than that, the iframe payload can be embedded as one of two options. The first payload requires user interaction (the user clicking on the malicious feed entry) with default user configuration, and the second payload fires instantly right after the user adds the feed or logs into the account while the feed entry is still visible. This is because of laz
Remediation
Check the references section for vendor advisories and patches from freshrss. Update freshrss to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| freshrss | freshrss | >= 0, < 1.26.2 | Affected |
Frequently Asked Questions
What is CVE-2025-31136?
CVE-2025-31136 is a medium-severity vulnerability affecting freshrss freshrss. It was published on June 4, 2025 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
How severe is CVE-2025-31136?
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-31136?
Check the references section for vendor advisories and patches from freshrss. Update freshrss to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-31136?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-31136 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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