Arbitrary file upload in Microsoft Windows
CVE-2021-34551
PHPMailer before 6.5.0 on Windows allows remote code execution if lang_path is untrusted data and has a UNC pathname.
Vulnerability class: Unrestricted File Upload
EPSS: 0.028 (84.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows
- Phpmailer_project Phpmailer
- Fedoraproject Fedora — versions 33, 34
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-34551?
- CVE-2021-34551 is a high-severity vulnerability in Microsoft Windows, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.1/10. Published 2021-06-16.
- How severe is CVE-2021-34551?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-34551 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.