CVE-2023-26491

Name: CVE-2023-26491
Creator: NVD / NIST
Published: 2023-03-03T23:15:12.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2023-26491 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

RSSHub is an open source and extensible RSS feed generator. When the URL parameters contain certain special characters, it returns an error page that does not properly handle XSS vulnerabilities, allowing for the execution of arbitrary JavaScript code. Users who access the deliberately constructed URL are affected. This vulnerability was fixed in version c910c4d28717fb860fbe064736641f379fab2c91. Please upgrade to this or a later version, there are no known workarounds.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.43%

34.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Rsshub	Rsshub	< 2023-03-02

References

https://github.com/DIYgod/RSSHub/commit/c910c4d28717fb860fbe064736641f379fab2c91Patch
https://github.com/DIYgod/RSSHub/security/advisories/GHSA-32gr-4cq6-5w5qPatch, Vendor Advisory
https://github.com/DIYgod/RSSHub/commit/c910c4d28717fb860fbe064736641f379fab2c91Patch
https://github.com/DIYgod/RSSHub/security/advisories/GHSA-32gr-4cq6-5w5qPatch, Vendor Advisory

Timeline

Published: Mar 3, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-26491?

How severe is CVE-2023-26491?

CVE-2023-26491 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26491?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26491?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST