CVE-2021-3603 affects PHPMailer versions 6.4.1 and earlier, allowing untrusted code execution if a function named 'php' exists in the global namespace and the validateAddress() function's $patternselect parameter is set to its default 'php' value. This vulnerability carries a high severity CVSS score of 8.1, indicating a network-based attack with high impact on confidentiality, integrity, and availability, though with high attack complexity. There is currently no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage are minimal, suggesting low public awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 6.4.1CPE matchmatch criteria | cpe:2.3:a:phpmailer_project:phpmailer:*:*:*:*:*:*:*:* | ||
33CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
< 6.5.0CPE match | cpe:2.3:a:phpmailer:phpmailer:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.