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AVideo EUVDEUVD-2026-76069

| CVE-2026-89257 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-09-11 VulnCheck GHSA-7r9w-g597-h25f
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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
vuln.today AI
5.4 MEDIUM

Network-accessible endpoint, low complexity; requires authenticated low-privilege session (PR:L); no confidentiality impact; limited integrity and availability impact from asset directory deletion only.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Metadata Corrected
Sep 11, 2026 - 12:40 vuln.today
tag: CSRF removed
Metadata Corrected
Sep 11, 2026 - 12:40 vuln.today
tag: Authentication Bypass removed
Analysis Generated
Sep 11, 2026 - 11:51 vuln.today

DescriptionCVE.org

AVideo through 29.0 contains an insecure direct object reference (IDOR) vulnerability in objects/categoryDeleteAssets.json.php. The endpoint validates only the Category::canCreateCategory() capability and a CSRF nonce before passing the attacker-supplied $_REQUEST['id'] to Category::deleteAssets(), which recursively removes {systemRootPath}videos/categories/assets/{id}/. It omits the Category::userCanEditCategory() ownership check enforced by the sibling Category::delete(). On installations where the non-default usersCanCreateNewCategories setting is enabled, an authenticated non-admin user with the canUpload capability can send a POST request with an arbitrary category ID and recursively delete any category's on-disk asset directory (icons/images). Category records and videos are not deleted. As of the advisory publication no patched version was available.

AnalysisAI

Missing ownership-check IDOR in AVideo through 29.0 allows an authenticated low-privilege user to recursively delete any category's on-disk asset directory (icons and images) regardless of ownership. The vulnerable endpoint objects/categoryDeleteAssets.json.php validates the CSRF nonce and the canCreateCategory capability but skips the userCanEditCategory ownership check enforced by the sibling delete handler, passing attacker-controlled category IDs directly to Category::deleteAssets(). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires three concrete conditions to all be true simultaneously: (1) the attacker must hold a valid authenticated session with the `canUpload` capability - unauthenticated requests cannot exploit this; (2) the AVideo installation must have the `usersCanCreateNewCategories` site setting explicitly enabled - this is non-default, so default-configuration deployments are not vulnerable; (3) the attacker must supply a valid CSRF nonce, obtainable from any legitimate AVideo page in the same session. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 4.0 scores this at 5.3 (Medium) with VI:L/VA:L, which reasonably reflects limited impact: category asset directories are destroyed but no data exfiltration or code execution occurs. … 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 No vendor-released patch has been identified at time of analysis - the GitHub advisory GHSA-gf2v-r8wx-ghqj states no fix was available at publication. … Detailed patch versions, workarounds, and compensating controls in full report.

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EUVD-2026-76069 vulnerability details – vuln.today

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