Red Hat Security Advisory: thunderbird security update
Multiple security vulnerabilities have been identified in Mozilla Thunderbird as packaged for Red Hat Enterprise Linux 9. These include a user interface misrepresentation of attachment URLs, information disclosure of the /tmp directory listing, and leakage of hashed Windows credentials via crafted attachment URLs. Red Hat has issued an important security advisory with updates to address these issues in Thunderbird. The vulnerabilities affect various architectures and extended update support versions of Red Hat Enterprise Linux 9. Users are advised to apply the provided security updates to mitigate these vulnerabilities.
AI Analysis
Technical Summary
This advisory covers three security vulnerabilities in Mozilla Thunderbird affecting Red Hat Enterprise Linux 9 distributions. CVE-2025-3523 involves UI misrepresentation of attachment URLs, potentially misleading users about attachment sources. CVE-2025-2830 allows information disclosure of the /tmp directory listing, which could expose sensitive temporary files. CVE-2025-3522 involves leaking hashed Windows credentials through crafted attachment URLs. Red Hat has issued updated Thunderbird packages to remediate these vulnerabilities across multiple supported architectures and update streams.
Potential Impact
Successful exploitation of these vulnerabilities could lead to user interface deception, unauthorized disclosure of temporary directory contents, and leakage of hashed Windows credentials. These impacts may facilitate further attacks or unauthorized access to sensitive information. The advisory rates the overall security impact as Important (high severity). There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages that address these vulnerabilities. Users and administrators should apply the security update for Thunderbird on Red Hat Enterprise Linux 9 and its variants as detailed in the Red Hat advisory RHSA-2025:7435. Refer to https://access.redhat.com/articles/11258 for update instructions. Since official fixes are available, applying these updates is the recommended remediation.
Red Hat Security Advisory: thunderbird security update
Description
Multiple security vulnerabilities have been identified in Mozilla Thunderbird as packaged for Red Hat Enterprise Linux 9. These include a user interface misrepresentation of attachment URLs, information disclosure of the /tmp directory listing, and leakage of hashed Windows credentials via crafted attachment URLs. Red Hat has issued an important security advisory with updates to address these issues in Thunderbird. The vulnerabilities affect various architectures and extended update support versions of Red Hat Enterprise Linux 9. Users are advised to apply the provided security updates to mitigate these vulnerabilities.
Affected software
pkg:rpm/redhat/thunderbirdRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers three security vulnerabilities in Mozilla Thunderbird affecting Red Hat Enterprise Linux 9 distributions. CVE-2025-3523 involves UI misrepresentation of attachment URLs, potentially misleading users about attachment sources. CVE-2025-2830 allows information disclosure of the /tmp directory listing, which could expose sensitive temporary files. CVE-2025-3522 involves leaking hashed Windows credentials through crafted attachment URLs. Red Hat has issued updated Thunderbird packages to remediate these vulnerabilities across multiple supported architectures and update streams.
Potential Impact
Successful exploitation of these vulnerabilities could lead to user interface deception, unauthorized disclosure of temporary directory contents, and leakage of hashed Windows credentials. These impacts may facilitate further attacks or unauthorized access to sensitive information. The advisory rates the overall security impact as Important (high severity). There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated Thunderbird packages that address these vulnerabilities. Users and administrators should apply the security update for Thunderbird on Red Hat Enterprise Linux 9 and its variants as detailed in the Red Hat advisory RHSA-2025:7435. Refer to https://access.redhat.com/articles/11258 for update instructions. Since official fixes are available, applying these updates is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:7435
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-3522","CVE-2025-3523"]
Threat ID: 6a4049e927e9c79719835926
Added to database: 06/27/2026, 22:08:41 UTC
Last enriched: 06/27/2026, 22:37:46 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 51
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