CVE-2025-53941: XSS (CVSS 6.1)

Description

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue.

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CVSS v3.1 Score

6.1

MEDIUM

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

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://github.com/fedify-dev/hollo/commit/f9d25e10ba5406c27f9e87dfb01f75b6a52f2410 https://github.com/fedify-dev/hollo/releases/tag/0.6.5 https://github.com/fedify-dev/hollo/security/advisories/GHSA-w7gc-g3x7-hq8h https://github.com/fedify-dev/hollo/security/advisories/GHSA-w7gc-g3x7-hq8h

Frequently Asked Questions

What is CVE-2025-53941? +

Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Versions prior to 0.6.5 allow HTML form elements to be submitted, making the software vulnerable to HTML injection. Version 0.6.5 fixes the issue. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-53941? +

CVE-2025-53941 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-53941? +

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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