CVE-2026-54458

CRITICALPre-NVD 9.69.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-04. A secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-44824 (ENISA EUVD) · GHSA-8whc-2wmv-ww35 (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that renders the YPTSocket online-users debug panel. plugin/YPTSocket/getWebSocket.json.php issues a signed WebSocket token to any anonymous caller, and MessageSQLiteV2::onOpen at plugin/YPTSocket/MessageSQLiteV2.php lines 91 and 110 reads the attacker-controlled webSocketSelfURI and page_title query parameters from the WebSocket connection URL with no validation. Both values persist into the in-memory SQLite connections table and broadcast inside the users_id_online array sent to every connected client; on the client, plugin/YPTSocket/script.js::updateSocketUserCard interpolates the broadcast page_title into an HTML template literal that is passed to jQuery $.append(html), which parses attacker bytes into live DOM nodes including with inline event handlers. Successful attackers can can read non-HttpOnly cookies and the CSRF token rendered into the admin dashboard, issue authenticated requests to any admin-only endpoint, exfiltrate the admin dashboard DOM, and chain into any admin-context mutation. When the victim is an AVideo administrator, the attacker turns a single anonymous WebSocket connection into full administrative takeover via the admin's own session. This issue has been patched by https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 4, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Oct 7, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Unauthenticated Stored DOM Cross-Site Scripting via Per-Client Metadata Broadcast in YPTSocket Plugin · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-8whc-2wmv-ww35
GitHub commit Patch Available

commit 8be71e53ccbe (WWBN/AVideo)

Patch available: WWBN/AVideo v29.1.0 (contains commit 8be71e53ccbe)

https://github.com/WWBN/AVideo/commit/8be71e53ccbe9b84b30870db386fb4d2b11e1c16

Vendor Advisories for CVE-2026-54458(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composerWWBN/AVideo—ghsa
composerWWBN/AVideo @ 29.1.0 (fixes < 29.1.0)—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 rangeFix by version rangeDependents
WWBN/AVideo—
  • every version through 29.0: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 76× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 335 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 235 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-11-01 21:19 UTCEG score recompute
  3. 2026-11-01 21:19 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  4. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-31 21:49 UTCEG score recompute
  6. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-30 22:18 UTCEG score recompute
  8. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-29 22:42 UTCEG score recompute
  10. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-28 23:11 UTCEG score recompute
  12. 2026-10-28 23:10 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-27 23:38 UTCEG score recompute
  15. 2026-10-27 23:38 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-27 00:04 UTCEG score recompute
  18. 2026-10-27 00:03 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-10-25 20:57 UTCEG score recompute
  21. 2026-10-25 20:57 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  22. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  23. 2026-10-25 14:19 UTCEG score recompute
  24. 2026-10-24 21:26 UTCEG score recompute
  25. 2026-10-24 21:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
Show 75 more
  1. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-24 13:06 UTCEG score recompute
  3. 2026-10-24 13:06 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  4. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-23 13:32 UTCEG score recompute
  6. 2026-10-23 13:32 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  7. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-22 13:59 UTCEG score recompute
  9. 2026-10-22 13:59 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-21 14:26 UTCEG score recompute
  12. 2026-10-21 14:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-20 14:34 UTCEG score recompute
  15. 2026-10-20 14:33 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-19 13:39 UTCEG score recompute
  18. 2026-10-19 13:39 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  19. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-18 13:32 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  21. 2026-10-18 03:31 UTCEG score recompute
  22. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-17 14:00 UTCEG score recompute
  24. 2026-10-17 14:00 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  25. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  26. 2026-10-16 14:26 UTCEG score recompute
  27. 2026-10-16 14:26 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  28. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-10-15 14:42 UTCEG score recompute
  30. 2026-10-15 14:41 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  31. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-10-14 09:16 UTCEG score recompute
  33. 2026-10-14 09:15 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  34. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  35. 2026-10-13 06:28 UTCEG score recompute
  36. 2026-10-13 06:28 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  37. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  38. 2026-10-12 15:56 UTCEG score recompute
  39. 2026-10-12 06:56 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  40. 2026-10-11 19:39 UTCEG score recompute
  41. 2026-10-11 16:54 UTCEG score recompute
  42. 2026-10-11 14:18 UTCEG score recompute
  43. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  44. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  45. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  46. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  47. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  48. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  49. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  50. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  51. 2026-10-03 19:51 UTCOSV refresh
  52. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  53. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  54. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  55. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  56. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  57. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  58. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  59. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  60. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  61. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  62. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  63. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  64. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  65. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  66. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  67. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  68. 2026-09-14 09:39 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  69. 2026-09-14 05:22 UTCEG score recompute
  70. 2026-09-14 05:22 UTCGHSA enrichmentGHSA-8whc-2wmv-ww35 · GitHub severity CRITICAL · GitHub CVSS 9.6
  71. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  72. 2026-09-12 23:36 UTCOSV refresh
  73. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  74. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  75. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54458?
CVE-2026-54458 is a critical-severity vulnerability; its CVE record was published on June 4, 2026. WWBN AVideo is an open source video platform. Versions prior to 29.0 contain a stored DOM Cross-Site Scripting vulnerability in the YPTSocket plugin. Any unauthenticated remote attacker can execute arbitrary JavaScript in the authenticated origin of every administrator currently viewing a page that…
When was the CVE record for CVE-2026-54458 published?
The CVE record for CVE-2026-54458 was published on June 4, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-54458 actively exploited?
CVE-2026-54458 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54458?
CVE-2026-54458 has a CVSS base score of 9.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54458?
A fix for CVE-2026-54458 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54458 are linked in the Vendor Advisories panel on this page.

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