SecuriTricks - CVE-2025-14331

Description

Same-origin policy bypass in the Request Handling component. This vulnerability affects Firefox < 146, Firefox ESR < 115.31, Firefox ESR < 140.6, Thunderbird < 146, and Thunderbird < 140.6.

Product(s) Impacted

Vendor	Product	Versions
Mozilla	Firefox Thunderbird	* *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-346

Origin Validation Error

The product does not properly verify that the source of data or communication is valid.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mozilla	firefox	/	/	/	/	esr	/	/	/
a	mozilla	firefox	/	/	/	/	-	/	/	/
a	mozilla	firefox	/	/	/	/	esr	/	/	/
a	mozilla	thunderbird	/	/	/	/	esr	/	/	/
a	mozilla	thunderbird	/	/	/	/	-	/	/	/

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2000218

https://www.mozilla.org/security/advisories/mfsa2025-92/

https://www.mozilla.org/security/advisories/mfsa2025-93/

https://www.mozilla.org/security/advisories/mfsa2025-94/

https://www.mozilla.org/security/advisories/mfsa2025-95/

https://www.mozilla.org/security/advisories/mfsa2025-96/

CVSS Score

6.5 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: LOW
Availability Impact: NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

View Vector String

Timeline

Published: Dec. 9, 2025, 4:17 p.m.
Last Modified: Dec. 10, 2025, 8:18 p.m.

Status : Analyzed

CVE has had analysis completed and all data associations made.

More info

Source

security@mozilla.org

CVE-2025-14331