SecuriTricks - CVE-2025-4093

Description

Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.10 and Thunderbird ESR < 128.10.

Product(s) Impacted

Vendor	Product	Versions
Mozilla	Firefox Thunderbird	128.9 128.9

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.

*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	128.9	/	/	/	/	/	/	/
a	mozilla	thunderbird	128.9	/	/	/	/	/	/	/

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1894100

https://www.mozilla.org/security/advisories/mfsa2025-29/

https://www.mozilla.org/security/advisories/mfsa2025-32/

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: April 29, 2025, 2:15 p.m.
Last Modified: April 29, 2025, 4:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security@mozilla.org

CVE-2025-4093