CVE-2025-53941

Hollo renders posts received with form elements and allows submission

State: Published
Severity: 6.1 Medium
Published: Jul 17, 2025
Updated: Jul 17, 2025
Reserved: Jul 14, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.1 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
hollofedify-dev	< 0.6.5Affected

References

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

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