Vulnerability · Published Mar 9, 2026 · Assigned by GitHub_M
CVE-2026-28281InstantCMS has Multiple CSRF Vulnerabilities
High 7.1
In plain English
A high-severity cross-site request forgery in icms2 from instantsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 95.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| instantsoft | icms2 | < 2.18.1 |
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
References
- https://github.com/instantsoft/icms2/security/advisories/GHSA-pp43-262q-h73m x_refsource_CONFIRM