# CVE-2026-126806: WWBN AVideo 14.3 through 29.7.1 Stored XSS via Video Source Tag

Status: published. Published: 2026-11-11. Updated: 2026-11-13.

WWBN AVideo 14.3 through 29.7.1 contains a stored cross-site scripting vulnerability that allows uploaders to inject scripts via the videoDownloadedLink value stored unescaped through objects/aVideoEncoder.json.php. Attackers can embed event-handler payloads in the URL host rendered as a Source tag in view/managerVideos_body.php, executing in administrator sessions to install plugin archives containing PHP.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/WWBN/AVideo/commit/da1da205608d57b1e695a7fad8288a2f5f9a0e0f

## Affected products and versions

- WWBN / AVideo (WWBN/AVideo): ≥ 14.3; ≤ 29.7.1 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N; source: CNA: VulnCheck

- CVSS 4.0: 9.3 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/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; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 8.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.36% as of 2026-11-13; percentile 30.25%

- SSVC: exploitation poc; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

- exploit: https://github.com/WWBN/AVideo/security/advisories/GHSA-2qq6-qfcq-jmr9 (ADP: CISA-ADP)

## References

- https://github.com/WWBN/AVideo/security/advisories/GHSA-2qq6-qfcq-jmr9 (CNA: VulnCheck; vendor-advisory)

- https://github.com/WWBN/AVideo/commit/da1da205608d57b1e695a7fad8288a2f5f9a0e0f (CNA: VulnCheck; patch)

- https://github.com/WWBN/AVideo/blob/v29.7.1/objects/functionTags.php#L198-L221 (CNA: VulnCheck; technical-description)

- https://github.com/WWBN/AVideo/blob/v29.7.1/view/managerVideos_body.php#L1997-L2011 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/wwbn-avideo-14.3-through-29.7.1-stored-xss-via-video-source-tag (CNA: VulnCheck; third-party-advisory)

- https://github.com/WWBN/AVideo/security/advisories/GHSA-2qq6-qfcq-jmr9 (ADP: CISA-ADP; exploit)

- https://github.com/WWBN/AVideo/blob/v29.7.1/objects/functionTags.php#L198-L221 (disclosure@vulncheck.com)

- https://github.com/WWBN/AVideo/blob/v29.7.1/view/managerVideos_body.php#L1997-L2011 (disclosure@vulncheck.com)

- https://github.com/WWBN/AVideo/commit/da1da205608d57b1e695a7fad8288a2f5f9a0e0f (disclosure@vulncheck.com)

- https://github.com/WWBN/AVideo/security/advisories/GHSA-2qq6-qfcq-jmr9 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/wwbn-avideo-14.3-through-29.7.1-stored-xss-via-video-source-tag (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-126806; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126806; retrieved 2026-11-12; source updated 2026-11-11

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-126806; retrieved 2026-11-13; source updated Not reported

Revision: ee6517691d603da36c27be9ac9f2abf7bae4de252956759202af2f30149d064f

Canonical: https://y2.dev/cve/CVE-2026-126806

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.