Displaying a message could load an attacker-chosen URL through an OpenPGP key attachment
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Mozilla Thunderbird is affected: when a message containing an OpenPGP key attachment was displayed, the client automatically fetched an attacker-chosen URL without user action, bypassing remote content blocking. On Windows, this could expose the user's NTLM credentials to an attacker-controlled network share.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
When a message containing an OpenPGP key attachment was displayed, Thunderbird automatically loaded the attachment's content to offer importing the key. A sender could mark the attachment as an external attachment pointing to an arbitrary URL, which Thunderbird then loaded without any user interaction, bypassing remote content blocking. On Windows, a URL pointing to an attacker-controlled network share could leak the user's NTLM credentials. The NTLM credential leak only affects Thunderbird on Windows. On other operating systems, the issue allowed a remote request that bypassed remote content blocking. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.
Timeline
- CVE published
- First seen by cve.now
- Record last updated
Affected versions
- Mozilla Thunderbird
Version range not reported