EUVD-2026-72859
GHSA-vhpv-cv9q-cpgj
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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
Network-reachable endpoint, low complexity; PR:L reflects mandatory valid password; no availability impact from account takeover.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
AVideo through c3edcc274c389816d434acadac07ee78eaf330c1 contains an authentication bypass vulnerability in LoginControl::verifyChallenge() that uses loose comparison () instead of strict comparison (=) against unset session values. Attackers with only a password can submit an empty request to verifyChallenge.json.php to bypass PGP two-factor authentication and gain full authenticated access.
Articles & Coverage 1
AnalysisAI
PGP two-factor authentication bypass in AVideo's LoginControl::verifyChallenge() allows a network-accessible attacker holding only a valid account password to completely circumvent the PGP 2FA step and obtain full authenticated session access. The flaw stems from PHP's loose equality operator (==) comparing the submitted challenge against an unset session variable, which evaluates as true when an empty value is submitted - a classic PHP type-juggling weakness. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid AVideo account username and password - the vulnerability bypasses only the second factor, not the primary password check. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 (AV:N/AC:L/AT:N/PR:L/UI:N) accurately characterizes this issue. … 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 | The primary remediation is to update AVideo to a commit or release that includes the fix referenced in GHSA-vmpj-f3mf-q4j2 (https://github.com/WWBN/AVideo/security/advisories/GHSA-vmpj-f3mf-q4j2). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Disable PGP 2FA in all AVideo instances and implement strict network-based access controls (IP whitelisting, VPN-only access). …
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Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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