CVE-2026-54458
Stored XSS in WWBN AVideo YPTSocket plugin enables admin session takeover via unauthenticated WebSocket.
Is CVE-2026-54458 being exploited?
Not confirmed. CVE-2026-54458 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.51% probability of exploitation in the next 30 days.
How severe is CVE-2026-54458?
CVE-2026-54458 is rated Critical with a CVSS score of 9.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-54458?
Yes. A fix has been recorded for CVE-2026-54458. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54458 affect?
CVE-2026-54458 affects WWBN AVideo < 29.0, YPTSocket plugin (all vulnerable versions). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54458?
Update AVideo to 29.0+ or apply upstream patch immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can inject JS into admin dashboards via WebSocket, steal non-HttpOnly cookies and CSRF token, and perform full administrative takeover.
Immediate action required
- affected<= 29.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.