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Avideo CVE-2026-33650

| EUVDEUVD-2026-14488 HIGH
Incorrect Authorization (CWE-863)
2026-03-23 GitHub_M GHSA-8x77-f38v-4m5j
7.6
CVSS 3.1 · GitHub Advisory
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as Videos Moderator user
  2. Delivery
    Access videoAddNew.json.php endpoint
  3. Exploit
    Modify video ownership or metadata
  4. Execution
    Transfer video ownership to attacker account
  5. Impact
    Delete or manage arbitrary videos

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Attacker must have authenticated access with the 'Videos Moderator' permission in WWBN AVideo versions up to 26.0. No victim interaction required. Remote exploitation via videoAddNew.json.php and videoDelete.json.php endpoints.

Impact

The CVSS score of 7.6 (High) reflects network-based exploitation (AV:N) with low complexity (AC:L) requiring only low-level authenticated access (PR:L) and no user interaction (UI:N), producing high integrity impact (I:H) with low confidentiality and availability impacts. The vulnerability poses moderate real-world risk because it requires prior authentication with a specific moderator role, limiting the attack surface to insider threats or compromised moderator accounts. While the CVSS complexity is low and the attack chain is straightforward (transfer ownership then delete), exploitation requires legitimate platform access. No EPSS score, KEV listing, or public proof-of-concept is mentioned in the available data, suggesting limited in-the-wild exploitation. Organizations running AVideo with multiple user permission tiers should prioritize patching, while single-administrator deployments face lower risk.

Exploit ScenarioDerived

An authenticated attacker with the Videos Moderator permission logs into the AVideo platform and identifies a target video owned by another user. The attacker exploits the overprivileged canModerateVideos() check by calling videoAddNew.json.php to transfer ownership of the victim's video to themselves, then immediately calls videoDelete.json.php which only validates current ownership, successfully deleting the video despite lacking legitimate authority. This attack requires only low-complexity HTTP requests to the vulnerable endpoints and can be executed without user interaction.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 23, 2026

Privilege escalation in WWBN AVideo up to version 26.0 allows users with "Videos Moderator" permissions to gain full video management capabilities, including transferring ownership and deleting any video, by exploiting inconsistent authorization checks between the video editing and deletion endpoints. An authenticated attacker can chain an ownership transfer with deletion operations to compromise videos outside their legitimate scope. A patch is available in commit 838e16818c793779406ecbf34ebaeba9830e33f8.

Earlier versions of this analysis (1)
v1 Mar 23, 2026 - 18:45 CVSS 7.6

A privilege escalation vulnerability exists in WWBN AVideo versions up to and including 26.0, allowing users with the limited 'Videos Moderator' permission to escalate privileges and perform full video management operations including ownership transfer and deletion of any video. The vulnerability exploits asymmetric authorization checks where videoAddNew.json.php permits full editing via canModerateVideos() permission, while videoDelete.json.php only verifies ownership, enabling a two-step attack chain. A patch is available in commit 838e16818c793779406ecbf34ebaeba9830e33f8, and there is no evidence of active exploitation (not in CISA KEV).

RemediationAI

Apply the patch provided in commit 838e16818c793779406ecbf34ebaeba9830e33f8 available at https://github.com/WWBN/AVideo/commit/838e16818c793779406ecbf34ebaeba9830e33f8, or upgrade to a version containing this fix. Review the GitHub Security Advisory at https://github.com/WWBN/AVideo/security/advisories/GHSA-8x77-f38v-4m5j for vendor-specific upgrade guidance and any additional security recommendations. As an interim mitigation until patching is complete, administrators should audit user accounts with Videos Moderator permissions, restrict this role to only fully trusted users, implement logging and monitoring of video ownership changes and deletions, and consider temporarily revoking the Videos Moderator permission if not operationally critical.

Affected VersionsENISA

AVideo ≤ 26.0

Affected Packages

composer wwbn/avideo no fix
euvd avideo no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in composer, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

WWBN AVideo is an open-source PHP-based video platform (cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*). The vulnerability represents a classic instance of CWE-863 (Incorrect Authorization), where the application implements inconsistent authorization boundaries across related operations. The Permissions::canModerateVideos() function is incorrectly used as an authorization gate in videoAddNew.json.php for full video editing capabilities, while videoDelete.json.php implements a separate ownership-based check. This creates an exploitable asymmetry where a moderator can transfer video ownership to themselves via the editing endpoint, then delete the video using the deletion endpoint that only validates current ownership without rechecking original permissions.

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Severity by source

GitHub Advisory PRIMARY 7.6 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

DescriptionGitHub Advisory

WWBN AVideo is an open source video platform. In versions up to and including 26.0, a user with the "Videos Moderator" permission can escalate privileges to perform full video management operations - including ownership transfer and deletion of any video - despite the permission being documented as only allowing video publicity changes (Active, Inactive, Unlisted). The root cause is that Permissions::canModerateVideos() is used as an authorization gate for full video editing in videoAddNew.json.php, while videoDelete.json.php only checks ownership, creating an asymmetric authorization boundary exploitable via a two-step ownership-transfer-then-delete chain. Commit 838e16818c793779406ecbf34ebaeba9830e33f8 contains a patch.

Executive ViewAI

Why It Matters

A privilege escalation vulnerability in WWBN AVideo versions up to 26.0 allows video moderators to illegally escalate permissions and gain full control over all videos, including transferring ownership and deleting content. This poses a critical risk to organizations relying on AVideo for content management, as disgruntled or compromised moderator accounts could result in unauthorized video deletion, theft of intellectual property, or service disruption.

Business Impact: High
Compensating Controls

Until patch deployment: (1) Restrict 'Videos Moderator' role to a minimal set of trusted administrators; (2) Implement WAF rules to monitor and block suspicious videoAddNew.json.php and videoDelete.json.php requests from moderator-level accounts; (3) Enable detailed audit logging for all video management operations; (4) Consider temporarily disabling video moderator functionality if operationally feasible; (5) Implement IP-based access controls to limit moderator access to trusted networks only.

Threat Intelligence Overview

EPSS Score
0.0%
Top 92% exploitable
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment GitHub VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
Poc
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Partial

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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