How serious is CVE-2026-28281?

This vulnerability has a CVSS score of 7.1 out of 10, classified as HIGH severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-28281?

Yes, proof-of-concept exploit code for CVE-2026-28281 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-28281?

CVE-2026-28281 affects instantcms instantcms. Check the full CVE details for specific version information.

How do I fix CVE-2026-28281?

To remediate CVE-2026-28281, check for security patches from instantcms. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-28281

High

|7.1

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows attackers to gain moderator privileges, execute tasks, delete posts, and accept friend requests on behalf of users without their consent. It occurs because the system fails to properly check security tokens, and it affects versions prior to 2.18.1, so upgrading is essential to protect against these risks.

Technical 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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

Confidentiality ImpactLow

Integrity ImpactHigh

Availability ImpactNone

ScopeUnchanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$1,211($1K-$5K)

Vendor Response

Grade APatched in 2 days

Quick Information

Published

Mar 10, 2026

28 days ago

Last Modified

Mar 13, 2026

25 days ago

Vendor

instantcms

Product

instantcms