CVE-2026-84477

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-02. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

AVideo Live_schedule::setTitle() and setDescription() store POST input without sanitization, allowing users with streaming permission to inject malicious scripts. Unauthenticated attackers can access remindMe.php to execute stored XSS payloads in victim browsers without requiring authentication.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 1, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

AVideo Stored XSS via Live Schedule Title Description | Advisories | VulnCheck

https://www.vulncheck.com/advisories/avideo-stored-xss-via-live-schedule-title-description
github Patch Available🟡 PoC Available

Stored XSS in live-schedule title and description: Live_schedule::setTitle() and setDescription() store $_POST verbatim, and plugin/Live/remindMe.php echoes the title unescaped on a page that requires no session · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-625v-vrhq-g274

Vendor Advisories for CVE-2026-84477(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 18× in last 7d / 66× 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. 2026-09-24 16:51 UTCEG score recompute
  2. 2026-09-24 16:51 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:36 UTCGHSA enrichment
  6. 2026-09-22 18:05 UTCEG score recompute
  7. 2026-09-22 18:04 UTCGHSA enrichment
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-21 21:09 UTCEPSS rescore
  10. 2026-09-21 17:50 UTCEG score recompute
  11. 2026-09-21 17:50 UTCGHSA enrichment
  12. 2026-09-20 20:16 UTCEPSS rescore
  13. 2026-09-20 18:35 UTCGHSA enrichment
  14. 2026-09-19 19:20 UTCEG score recompute
  15. 2026-09-19 19:20 UTCGHSA enrichment
  16. 2026-09-18 19:55 UTCEG score recompute
  17. 2026-09-18 19:55 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-17 20:40 UTCEG score recompute
  20. 2026-09-17 20:40 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-16 18:38 UTCEG score recompute
  23. 2026-09-16 18:38 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 41 more
  1. 2026-09-15 19:06 UTCEG score recompute
  2. 2026-09-15 19:06 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-14 19:50 UTCGHSA enrichment
  6. 2026-09-13 20:35 UTCEG score recompute
  7. 2026-09-13 20:35 UTCGHSA enrichment
  8. 2026-09-12 21:20 UTCEG score recompute
  9. 2026-09-12 21:20 UTCGHSA enrichment
  10. 2026-09-11 22:05 UTCEG score recompute
  11. 2026-09-11 22:05 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 22:50 UTCEG score recompute
  15. 2026-09-10 22:50 UTCGHSA enrichment
  16. 2026-09-09 23:35 UTCEG score recompute
  17. 2026-09-09 23:35 UTCGHSA enrichment
  18. 2026-09-08 22:01 UTCEPSS rescore
  19. 2026-09-08 20:50 UTCGHSA enrichment
  20. 2026-09-08 11:14 UTCEG score recompute
  21. 2026-09-08 11:13 UTCGHSA enrichment
  22. 2026-09-07 11:57 UTCEG score recompute
  23. 2026-09-07 11:56 UTCGHSA enrichment
  24. 2026-09-06 13:48 UTCEPSS rescore
  25. 2026-09-06 12:38 UTCEG score recompute
  26. 2026-09-06 12:38 UTCGHSA enrichment
  27. 2026-09-05 15:31 UTCEPSS rescore
  28. 2026-09-05 13:23 UTCGHSA enrichment
  29. 2026-09-04 14:07 UTCEG score recompute
  30. 2026-09-04 14:07 UTCGHSA enrichment
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-03 14:50 UTCEG score recompute
  33. 2026-09-03 14:49 UTCGHSA enrichment
  34. 2026-09-02 15:31 UTCEG score recompute
  35. 2026-09-02 15:31 UTCGHSA enrichment
  36. 2026-09-02 14:46 UTCEG score recompute
  37. 2026-09-02 14:46 UTCGHSA enrichment
  38. 2026-09-02 14:12 UTCEPSS rescore
  39. 2026-09-01 23:25 UTCEG score recompute
  40. 2026-09-01 22:28 UTCEG score recompute
  41. 2026-09-01 22:27 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84477?
CVE-2026-84477 is a medium vulnerability published on September 1, 2026. AVideo Live_schedule::setTitle() and setDescription() store POST input without sanitization, allowing users with streaming permission to inject malicious scripts. Unauthenticated attackers can access remindMe.php to execute stored XSS payloads in victim browsers without requiring authentication.
When was CVE-2026-84477 disclosed?
CVE-2026-84477 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84477 actively exploited?
CVE-2026-84477 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 80.7% of all scored CVEs.
What is the CVSS score of CVE-2026-84477?
CVE-2026-84477 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-84477?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84477, 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

Explore the affected products and dependency analysis for CVE-2026-84477

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