What is CVE-2025-66421?

CVE-2025-66421 is a medium-severity vulnerability in Tryton Sao, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-30.

How severe is CVE-2025-66421?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Tryton Sao

CVE-2025-66421

Tryton sao (aka tryton-sao) before 7.6.11 allows XSS because it does not escape completion values. This is fixed in 7.6.11, 7.4.21, 7.0.40, and 6.0.69.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Tryton Sao — versions 0, 7.0.0, 7.1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2025-66421?: CVE-2025-66421 is a medium-severity vulnerability in Tryton Sao, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-30.
How severe is CVE-2025-66421?: Medium severity. CVSS v3 base score is 5.4 out of 10.