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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/fedify-dev/hollo/security/advisories/GHSA-w7gc-g3x7-hq8h
Patch x_refsource_misc
https://github.com/fedify-dev/hollo/commit/f9d25e10ba5406c27f9e87dfb01f75b6a52f2410
Release Notes x_refsource_misc
https://github.com/fedify-dev/hollo/releases/tag/0.6.5
Scores
CVSS v3
6.1
EPSS
0.0005
EPSS Percentile
13.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
fedify-dev/hollo
< 0.6.5
Published
Jul 17, 2025
Tracked Since
Feb 18, 2026