What is CVE-2025-55030?

CVE-2025-55030 is a medium-severity vulnerability in Mozilla Firefox, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 6.1/10. Published 2025-08-19.

How severe is CVE-2025-55030?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Vulnerability in Mozilla Firefox

CVE-2025-55030

Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks. This vulnerability was fixed in Firefox for iOS 142.

EPSS: 0.002 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Mozilla Firefox
Mozilla Firefox For Ios — versions 142

Weakness classification (CWE)

CWE-640 — Weak Password Recovery Mechanism for Forgotten Password

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2025-55030?: CVE-2025-55030 is a medium-severity vulnerability in Mozilla Firefox, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 6.1/10. Published 2025-08-19.
How severe is CVE-2025-55030?: Medium severity. CVSS v3 base score is 6.1 out of 10.