CVE-2026-21430

Emlog: CSRF chained with stored XSS leads to ATO

State: Published
Severity: 7.0 High
Published: Jan 2, 2026
Updated: Jan 5, 2026
Reserved: Dec 29, 2025

Description

Emlog is an open source website building system. In version 2.5.23, article creation functionality is vulnerable to cross-site request forgery (CSRF). This can lead to a user being forced to post an article with arbitrary, attacker-controlled content. This, when combined with stored cross-site scripting, leads to account takeover. As of time of publication, no known patched versions are available.

Scores

CVSS	Score	Vector	Source
4.0	7.0 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P	GitHub_M

Weaknesses

CWE-352 Cross-Site Request Forgery (CSRF)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
emlogemlog	= 2.5.23Affected

References

https://github.com/emlog/emlog/security/advisories/GHSA-2g2w-vmg7-pq4q

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