CVE-2026-88867

HIGHPre-NVD 8.78.7—
EchelonGraph scoreHIGH confidence

Score 8.7 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-10. a secondary CVSS source baseline 8.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

WWBN AVideo, in versions up to and including commit c3edcc274c389816d434acadac07ee78eaf330c1, contains a stored cross-site scripting vulnerability. objects/categoryAddNew.json.php passes the POST parameters name and iconClass to Category::setName() and Category::setIconClass(), which store the values without sanitization (setName only truncates to 45 characters). The category name is later echoed as HTML text and iconClass is echoed into a class attribute in view/modeYoutubeBottom.php and in Gallery cards (plugin/Gallery/functions.php). When the CustomizeUser option usersCanCreateNewCategories is enabled, any authenticated user with canUpload permission (granted by default via self-registration) can create a category containing a JavaScript payload; the payload then executes in the browser of any visitor, including administrators, who views a watch page or gallery entry for a video assigned to that category, allowing actions such as authenticated requests with the victim's session. The issue was unpatched at the time of reporting.

CVSS v3
8.7
EG Score
8.7(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

WWBN AVideo Stored XSS via Category Name and Icon Class | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wwbn-avideo-stored-xss-via-category-name-and-icon-class
github Patch Available🟡 PoC Available

Stored XSS: category `name` and `iconClass` are stored raw and echoed on every video assigned to that category · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-283q-fq8j-mhv8

Vendor Advisories for CVE-2026-88867(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 60× 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. 2026-09-25 00:43 UTCEG score recompute
  2. 2026-09-25 00:43 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 12:27 UTCGHSA enrichment
  5. 2026-09-24 00:10 UTCEG score recompute
  6. 2026-09-24 00:10 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 11:54 UTCGHSA enrichment
  9. 2026-09-22 23:38 UTCEG score recompute
  10. 2026-09-22 23:38 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 11:21 UTCGHSA enrichment
  13. 2026-09-21 23:05 UTCEG score recompute
  14. 2026-09-21 23:05 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 10:49 UTCGHSA enrichment
  17. 2026-09-20 22:33 UTCEG score recompute
  18. 2026-09-20 22:33 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 10:17 UTCGHSA enrichment
  21. 2026-09-19 22:01 UTCEG score recompute
  22. 2026-09-19 22:00 UTCGHSA enrichment
  23. 2026-09-19 09:44 UTCGHSA enrichment
  24. 2026-09-18 21:19 UTCEG score recompute
  25. 2026-09-18 21:19 UTCGHSA enrichment
Show 35 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 08:10 UTCGHSA enrichment
  3. 2026-09-17 19:54 UTCEG score recompute
  4. 2026-09-17 19:54 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 07:37 UTCGHSA enrichment
  7. 2026-09-16 19:21 UTCEG score recompute
  8. 2026-09-16 19:21 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 07:04 UTCEG score recompute
  11. 2026-09-16 07:04 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 18:48 UTCGHSA enrichment
  14. 2026-09-15 06:31 UTCEG score recompute
  15. 2026-09-15 06:31 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 18:15 UTCGHSA enrichment
  18. 2026-09-14 05:14 UTCGHSA enrichment
  19. 2026-09-13 16:58 UTCEG score recompute
  20. 2026-09-13 16:58 UTCGHSA enrichment
  21. 2026-09-13 16:48 UTCEPSS rescore
  22. 2026-09-13 04:41 UTCGHSA enrichment
  23. 2026-09-12 16:25 UTCEG score recompute
  24. 2026-09-12 16:25 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 04:09 UTCGHSA enrichment
  27. 2026-09-11 15:53 UTCEG score recompute
  28. 2026-09-11 15:53 UTCGHSA enrichment
  29. 2026-09-11 14:53 UTCEPSS rescore
  30. 2026-09-11 14:53 UTCEPSS rescore
  31. 2026-09-11 03:37 UTCEG score recompute
  32. 2026-09-11 03:37 UTCGHSA enrichment
  33. 2026-09-10 14:20 UTCEG score recompute
  34. 2026-09-10 13:20 UTCEG score recompute
  35. 2026-09-10 13:20 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88867?
CVE-2026-88867 is a high vulnerability published on September 10, 2026. WWBN AVideo, in versions up to and including commit c3edcc274c389816d434acadac07ee78eaf330c1, contains a stored cross-site scripting vulnerability. objects/categoryAddNew.json.php passes the POST parameters name and iconClass to Category::setName() and Category::setIconClass(), which store the…
When was CVE-2026-88867 disclosed?
CVE-2026-88867 was first published in the National Vulnerability Database on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88867 actively exploited?
CVE-2026-88867 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.3% of all scored CVEs.
What is the CVSS score of CVE-2026-88867?
CVE-2026-88867 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-88867?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88867, 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

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