CVE-2025-0510: Mozilla Thunderbird · Vulnerability
Affects Mozilla ThunderbirdSource CVE Database V5
Mentioned vulnerabilities
Not known to be exploited · CVSS 6.5 Medium · fixed in 128.7 : update Mozilla Thunderbird when convenient.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 20% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 128.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Feb 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
AI-suggested
This vulnerability has been fixed in Thunderbird versions 128.7 and 135. Users and administrators should update to at least Thunderbird 128.7 or later to remediate this issue. No additional mitigation steps are required as the vendor advisories confirm the vulnerability is addressed in these official releases.
Description
Thunderbird displayed an incorrect sender address if the From field of an email used the invalid group name syntax that is described in CVE-2024-49040. This vulnerability was fixed in Thunderbird 128.7 and Thunderbird 135.