CVE-2026-28281
InstantCMS has Multiple CSRF Vulnerabilities
7.1CVSSHIGH
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 Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:RUser InteractionRequired
Scope
S:UScopeUnchanged
Impact
C:LConfidentialityLow
I:HIntegrityHigh
A:NAvailabilityNone
Weaknesses
Affected Products
Attack Graph
Products CVE Techniques Tactics
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Exploitability
Workaround Available
MITRE ATT&CK
1 technique Initial Access
References
Timeline
Published
Mar 9, 2026
Last Updated
Mar 13, 2026
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