CVE-2026-28502: AVideo has Authenticated Remote Code Execution via Unsafe Plugin ZIP Extraction

Should you act?

Critical and remotely reachable

No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
• EPSS 1.0%, percentile 64: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Only applies if your dependency tree includes wwbn/avideo (Composer (PHP)) < 21.0, no fixed version listed. Check your lockfile, including transitive dependencies.

What it is

WWBN AVideo is an open source video platform. Prior to version 24.0, an authenticated Remote Code Execution (RCE) vulnerability was identified in AVideo related to the plugin upload/import functionality. The issue allowed an authenticated administrator to upload a specially crafted ZIP archive containing executable server-side files. Due to insufficient validation of extracted file contents, the archive was extracted directly into a web-accessible plugin directory, allowing arbitrary PHP code execution. This issue has been patched in version 24.0.

From the GitHub advisory

Summary An authenticated Remote Code Execution (RCE) vulnerability was identified in AVideo related to the plugin upload/import functionality.

The issue allowed an authenticated administrator to upload a specially crafted ZIP archive containing executable server-side files. Due to insufficient validation of extracted file contents, the archive was extracted directly into a web-accessible plugin directory, allowing arbitrary PHP code execution.

Vulnerability Type - Remote Code Execution (RCE) - CWE-434: Unrestricted Upload of File with Dangerous Type

Affected Versions - All versions up to and including 22.x.

Fixed Version - A fix is expected to be released in version 23.

Weakness type: CWE-434.

Product: wwbn/avideo (Composer (PHP)) · Assigned by: GitHub_M · Published: 2026-03-06

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Attack requirements: none
• Privileges required: none (no login)
• User interaction: none

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
• FIRST EPSS (model of 2026-10-21): 1.04% probability of exploitation activity in the next 30 days; percentile 64.

Timeline

• 2026-03-02 — GitHub-reviewed advisory GHSA-v8jw-8w5p-23g3 published (critical)
• 2026-03-06 — CVE record last updated
• 2026-03-06 — CVE record published by GitHub_M

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-v8jw-8w5p-23g3 github.com
2. CVE.org record CVE-2026-28502 cve.org
3. NVD entry CVE-2026-28502 nvd.nist.gov

Other references from the CVE record and advisory

1. github.com github.com
2. github.com github.com
3. github.com github.com

Critical Composer (PHP) advisories · Today’s Security Digest