#VU103616 Spoofing attack in Mozilla Thunderbird - CVE-2025-0510


Vulnerability identifier: #VU103616

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-0510

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of a sender address if the From field of an email used the invalid group name syntax. A remote attacker can spoof the email content.

Note, the vulnerability is similar to #VU100312 (CVE-2024-49040).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 102.0 - 102.15.1, 115.0 - 115.18.0, 128.0 - 128.6.0, 130.0 - 134.0


External links
http://www.mozilla.org/en-US/security/advisories/mfsa2025-10/
http://www.mozilla.org/en-US/security/advisories/mfsa2025-11/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability