CVE-2023-41330 is a critical remote code execution vulnerability affecting the knplabs/knp-snappy PHP library, which generates thumbnails, snapshots, or PDFs. It bypasses a previous fix for PHAR deserialization by exploiting case insensitivity in PHP wrappers (e.g., "PHAR://" instead of "phar://"). With a CVSS score of 9.8 (CRITICAL), this vulnerability allows unauthenticated attackers to execute arbitrary code and access the filesystem without user interaction, provided they can upload a malicious PHAR file and the server runs PHP versions prior to 8. While no public exploits, Metasploit modules, or significant community discussion have been observed, immediate upgrade to version 1.4.3 is strongly recommended, or restrict untrusted user input to the affected functions.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.4.3CPE matchmatch criteria | cpe:2.3:a:knplabs:snappy:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.