CVE-2026-28281 — HIGH (7.1)

Q: How severe is CVE-2026-28281?

CVE-2026-28281 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-28281?

Check the references section above for vendor advisories and patch information. Affected products include: Instantcms Instantcms.

Vulnerability 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 Score

7.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Instantcms	Instantcms	< 2.18.1

Related Weaknesses (CWE)

CWE-352

References

https://github.com/instantsoft/icms2/security/advisories/GHSA-pp43-262q-h73mExploitMitigationVendor Advisory

FAQ

What is CVE-2026-28281?

CVE-2026-28281 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...

How severe is CVE-2026-28281?

CVE-2026-28281 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-28281?

Check the references section above for vendor advisories and patch information. Affected products include: Instantcms Instantcms.