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Masa CMS CVE-2026-40309

| EUVD-2026-28156 HIGH
Cross-Site Request Forgery (CSRF) (CWE-352)
2026-05-06 security-advisories@github.com
7.2
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Patch available
May 06, 2026 - 21:03 EUVD
Analysis Generated
May 06, 2026 - 20:32 vuln.today
CVE Published
May 06, 2026 - 20:16 nvd
HIGH 7.2

DescriptionNVD

Masa CMS is a content management system forked from Mura CMS. In versions 7.5.2 and earlier, the cTrash.empty function does not validate anti-CSRF tokens for trash management requests. An attacker can induce a logged-in administrator to submit a forged request that empties the trash and permanently deletes all deleted content. This can cause irreversible data loss and disrupt recovery of content intended for restoration. This issue has been fixed in versions 7.2.10, 7.3.15, 7.4.10, and 7.5.3. As a workaround, restrict access to the administrative backend, use browser isolation for administrative sessions, and maintain current database backups to recover from unauthorized deletion.

AnalysisAI

Cross-Site Request Forgery in Masa CMS trash management allows remote attackers to permanently delete all trashed content through a logged-in administrator. An attacker tricks an authenticated admin into visiting a malicious page that submits a forged trash-emptying request, bypassing CSRF protections and causing irreversible data loss across all pending-deletion content. …

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RemediationAI

Within 24 hours: Identify all Masa CMS instances in your environment and document administrator access patterns; notify CMS administrators of the attack vector and implement mandatory security awareness briefing on CSRF attack techniques. Within 7 days: Implement network-level controls restricting administrator access to trusted networks only and enforce multi-factor authentication for all CMS administrative accounts. …

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CVE-2026-40309 vulnerability details – vuln.today

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