What is CVE-2025-62523?

CVE-2025-62523 is a medium-severity vulnerability in Thm Pilos, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 6.3/10. Published 2025-10-27.

How severe is CVE-2025-62523?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Thm Pilos

CVE-2025-62523

PILOS (Platform for Interactive Live-Online Seminars) is a frontend for BigBlueButton. PILOS before 4.8.0 includes a Cross-Origin Resource Sharing (CORS) misconfiguration in its middleware: it reflects the Origin request header back in the…

EPSS: 0.002 (8.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

Affected products

Thm Pilos
Thm-health Pilos — versions < 4.8.0

Weakness classification (CWE)

CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2025-62523?: CVE-2025-62523 is a medium-severity vulnerability in Thm Pilos, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 6.3/10. Published 2025-10-27.
How severe is CVE-2025-62523?: Medium severity. CVSS v3 base score is 6.3 out of 10.