CVE-2026-28281
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Instantcms
PublishedMar 10, 2026
First seenMar 10, 2026
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Update
- instantcms instantcms2.18.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| instantcms instantcms | v < 2.18.1 | 2.18.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.