What is CVE-2025-30090?

CVE-2025-30090 is a high-severity vulnerability in Squirrelmail, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-04-02.

How severe is CVE-2025-30090?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2025-30090 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Squirrelmail

CVE-2025-30090

mime.php in SquirrelMail through 1.4.23-svn-20250401 and 1.5.x through 1.5.2-svn-20250401 allows XSS via e-mail headers, because JavaScript payloads are mishandled after $encoded has been set to true.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (16.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Squirrelmail — versions 0, 1.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

Frequently asked questions

What is CVE-2025-30090?: CVE-2025-30090 is a high-severity vulnerability in Squirrelmail, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2025-04-02.
How severe is CVE-2025-30090?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2025-30090 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.