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Description

InstantCMS is a free and open source content management system. Prior to 2.18.1, InstantCMS does not validate CSRF tokens, which allows attackers grant moderator privileges to users, execute scheduled tasks, move posts to trash, and accept friend requests on behalf of the user. This vulnerability is fixed in 2.18.1.

PUBLISHED Reserved 2026-02-26 | Published 2026-03-09 | Updated 2026-03-10 | Assigner GitHub_M




HIGH: 7.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

Problem types

CWE-352: Cross-Site Request Forgery (CSRF)

Product status

< 2.18.1
affected

References

github.com/.../icms2/security/advisories/GHSA-pp43-262q-h73m

cve.org (CVE-2026-28281)

nvd.nist.gov (CVE-2026-28281)

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