EUVD-2026-72010
GHSA-w6w9-fw29-2x88
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/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
Remote, unauthenticated, no interaction file-write into the webroot yields code execution, so high C/I/A; token replay makes access trivial (PR:N/AC:L).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
WWBN AVideo contains a path traversal vulnerability in notify.ffmpeg.json.php that allows unauthenticated attackers to write files to arbitrary locations by supplying a caller-chosen path in the avideoRelativePath parameter. Attackers can replay any previously issued ciphertext as a notifyCode token, which is decrypted but never validated, to bypass authentication and write files to the application root and subdirectories.
Articles & Coverage 1
AnalysisAI
Unauthenticated arbitrary file write in WWBN AVideo's notify.ffmpeg.json.php endpoint lets remote attackers plant files anywhere under the application root by supplying an attacker-chosen path in the avideoRelativePath parameter. Authentication is trivially defeated because the notifyCode token is any previously issued ciphertext replayed back - the server decrypts it but never validates it - enabling a straight path from unauthenticated request to writing a PHP webshell and remote code execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires only network reachability of the AVideo web application and possession of any one valid notifyCode ciphertext previously issued by the target (or a compatible instance), since it is replayed without validation - no user credentials, no user interaction, and default configurations are affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority issue, not a paper-tiger high score. … 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 | Apply the fix referenced in the vendor's GitHub Security Advisory GHSA-cprx-fggj-7vpq (https://github.com/WWBN/AVideo/security/advisories/GHSA-cprx-fggj-7vpq) - the input does not name an exact version, so patch to the fixed release identified there (patch available per vendor advisory; released version not independently confirmed from input). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify and inventory all WWBN AVideo instances; immediately block network access to the notify.ffmpeg.json.php endpoint using firewall rules or Web Application Firewall policies, or disable the endpoint entirely if video transcoding notifications are not actively required. …
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Same weakness CWE-73 – External Control of File Name or Path
View allSame technique Path Traversal
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External POC / Exploit Code
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