What’s Vulnerable › Vulnerabilities
CVE-2026-28281: InstantCMS has Multiple CSRF Vulnerabilities
- Severity: high (CVSS 7.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-03-10 · updated 2026-06-17
- Weakness: CWE-352
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.
Affected products
- InstantCMS: before 2.18.1 — fixed in 2.18.1
How to fix
Upgrade to a fixed version: InstantCMS 2.18.1. Check the vendor advisory for mitigations.
References
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