EUVD-2026-81066
GHSA-q6pp-9mv4-x9xp
Severity by source
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
CSRF exploitable remotely with no attacker auth (PR:N) but requires admin to visit a crafted page (UI:R); no data read (C:N), subscriber records deleted/blacklisted gives I:H and modest A:L.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
phpList versions before 3.6.17 fail to validate cross-site request forgery tokens in the mass subscriber removal form handler. Attackers can induce logged-in administrators to visit crafted pages that silently delete and blacklist arbitrary subscriber addresses without authentication verification.
AnalysisAI
Cross-site request forgery in phpList before 3.6.17 allows remote attackers to silently delete and blacklist arbitrary subscriber addresses by inducing a logged-in administrator to load a crafted page, with no attacker credentials required on the target (CVSS 4.0 vector PR:N/UI:P). The vulnerable code path is the mass subscriber removal handler (public_html/lists/admin/massremove.php), which processes removal requests without validating a CSRF token, so the request is executed with the administrator's own session privileges. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a phpList administrator to be actively logged in AND to be induced to visit an attacker-controlled page while that session is valid - this user-interaction requirement (UI:P) is the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but bounded risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to phpList 3.6.17 (vendor-released patch: 3.6.17), which adds CSRF token validation at the start of public_html/lists/admin/massremove.php and removes the exploitation condition; the vendor advisory and public references are available at https://www.vulncheck.com/advisories/phplist-before-3.6.17-cross-site-request-forgery-via-massremove-php and https://github.com/phpList/phplist3. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, apply the Vendor-released patch: phpList 3.6.17 or later by upgrading all affected instances; if immediate patching is not possible, restrict administrative access and advise admins to avoid untrusted links while logged in. …
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External POC / Exploit Code
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