CVE-2026-50183

MEDIUMPre-NVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory published 2026-06-04. a secondary CVSS source baseline 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

WWBN AVideo is an open source video platform. Versions 29.0 and below contain a stored Cross-Site Scripting vulnerability in the YouTubeAPI plugin. The plugin renders the snippet.title field returned by the YouTube Data API into the homepage gallery markup with no HTML encoding. The title is set by the YouTube video uploader (anyone in the world) and is treated by AVideo as trusted content. A YouTube uploader who controls a video matching the operator's configured query injects HTML into the AVideo homepage by setting their video's title to a JavaScript-bearing string; the payload then executes in the browser of every visitor who loads any page that renders the gallery. When the visitor is an AVideo administrator, the injected JavaScript performs any admin action (create user, promote to admin, change configuration, install plugin) that uses cookie-based authentication without an additional CSRF token, escalating the bug into full administrative takeover. The payload persists for the duration of cacheTimeout (default 3600 seconds) after the malicious title is set on YouTube and survives YouTube removing the hostile video for the same window. This issue has been addressed by commit https://github.com/WWBN/AVideo/commit/7292129eaee5f609beae103b5cb387d55f17b877.

CVSS v3
4.7
EG Score
4.7(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity47% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
5.8%
KEV
Not listed

Published

June 4, 2026

Last Modified

July 16, 2026

Advisory Details (2)

Auto-updated Jul 16, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Stored XSS via Hostile YouTube Video Title in AVideo YouTubeAPI Gallery Section · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-66q5-cj5g-wrfx
github_commit

commit 7292129eaee5 (WWBN/AVideo)

Fix landed in WWBN/AVideo commit 7292129eaee5 — awaiting tagged release

https://github.com/WWBN/AVideo/commit/7292129eaee5f609beae103b5cb387d55f17b877

Vendor Advisories for CVE-2026-50183(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composerWWBN/AVideo—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
WWBN/AVideo———

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 03:18 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:25 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 00:16 UTCGHSA enrichment
  11. 2026-07-14 03:22 UTCGHSA enrichment
  12. 2026-07-11 11:51 UTCGHSA enrichment
  13. 2026-07-08 09:34 UTCGHSA enrichment
  14. 2026-07-06 02:49 UTCGHSA enrichment
  15. 2026-07-03 00:25 UTCGHSA enrichment
  16. 2026-07-01 23:13 UTCGHSA enrichment
  17. 2026-06-30 20:56 UTCGHSA enrichment
  18. 2026-06-29 19:24 UTCGHSA enrichment
  19. 2026-06-28 17:20 UTCGHSA enrichment
  20. 2026-06-27 16:10 UTCGHSA enrichment
  21. 2026-06-26 14:55 UTCGHSA enrichment
  22. 2026-06-25 10:26 UTCGHSA enrichment
  23. 2026-06-24 08:59 UTCGHSA enrichment
  24. 2026-06-23 01:55 UTCGHSA enrichment
  25. 2026-06-19 19:48 UTCGHSA enrichment
Show 18 more
  1. 2026-06-18 10:22 UTCGHSA enrichment
  2. 2026-06-17 09:12 UTCGHSA enrichment
  3. 2026-06-16 07:59 UTCGHSA enrichment
  4. 2026-06-15 06:50 UTCGHSA enrichment
  5. 2026-06-14 23:18 UTCEPSS rescore
  6. 2026-06-14 05:38 UTCGHSA enrichment
  7. 2026-06-13 23:00 UTCEPSS rescore
  8. 2026-06-13 04:28 UTCGHSA enrichment
  9. 2026-06-12 23:12 UTCEPSS rescore
  10. 2026-06-12 03:18 UTCGHSA enrichment
  11. 2026-06-11 02:08 UTCGHSA enrichment
  12. 2026-06-10 00:59 UTCGHSA enrichment
  13. 2026-06-08 23:49 UTCGHSA enrichment
  14. 2026-06-07 22:39 UTCGHSA enrichment
  15. 2026-06-06 21:30 UTCGHSA enrichment
  16. 2026-06-05 20:20 UTCGHSA enrichment
  17. 2026-06-04 19:10 UTCEG score recompute
  18. 2026-06-04 19:10 UTCGHSA enrichment

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-50183?
CVE-2026-50183 is a medium vulnerability published on June 4, 2026. WWBN AVideo is an open source video platform. Versions 29.0 and below contain a stored Cross-Site Scripting vulnerability in the YouTubeAPI plugin. The plugin renders the snippet.title field returned by the YouTube Data API into the homepage gallery markup with no HTML encoding. The title is set by…
When was CVE-2026-50183 disclosed?
CVE-2026-50183 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50183 actively exploited?
CVE-2026-50183 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50183?
CVE-2026-50183 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-50183?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50183, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-50183

Explore →

Is Your Infrastructure Affected by CVE-2026-50183?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs