CVE-2025-32015: freshrss XSS — Exploit & Fix

Description

FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, HTML is sanitized improperly inside the `<iframe srcdoc>` attribute, which leads to cross-site scripting (XSS) by loading an attacker's UserJS inside `<script src>`. 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.

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CVSS v3.1 Score

6.7

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
freshrss	freshrss	< 1.26.2

References

Advisories & Patches

https://github.com/FreshRSS/FreshRSS/commit/54e2f9107d03c5b3bb260f38fdb2736bce449fd4 https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-wgrq-mcwc-8f8v

Exploits

https://github.com/FreshRSS/FreshRSS/security/advisories/GHSA-wgrq-mcwc-8f8v

Frequently Asked Questions

What is CVE-2025-32015? +

FreshRSS is a self-hosted RSS feed aggregator. Prior to version 1.26.2, HTML is sanitized improperly inside the `<iframe srcdoc>` attribute, which leads to cross-site scripting (XSS) by loading an attacker's UserJS inside `<script src>`. 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. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2025-32015? +

CVE-2025-32015 has a CVSS v3.1 score of 6.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-32015? +

CVE-2025-32015 affects products from freshrss, specifically: freshrss. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-32015? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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