WP Compress – Image Optimizer [All-In-One] <= 6.10.33 - Unauthenticated Directory Traversal via css

9.1
Path Traversal: '../filedir'
CVE CVE-2023-6699
CVSS 9.1 (Critical)
Publicly Published January 3, 2024
Last Updated January 22, 2024
Researcher Krzysztof Zając - CERT PL

Description

The WP Compress – Image Optimizer [All-In-One] plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 6.10.33 via the css parameter. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information.

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Vulnerability Details for WP Compress – Instant Performance & Speed Optimization

Software Type Plugin
Software Slug wp-compress-image-optimizer (view on wordpress.org)
Patched? Yes
Remediation Update to version 6.10.34, or a newer patched version
Affected Version
  • <= 6.10.33
Patched Version
  • 6.10.34

Recent vulnerabilities in WP Compress – Instant Performance & Speed Optimization

# Title CVE ID CVSS Researchers Date
1 Compress <= 6.60.28 - Missing Authorization CVE-2026-25370 5.3 Nguyen Ba Khanh February 17, 2026
2 WP Compress <= 6.50.54 - Missing Authorization CVE-2025-57899 5.3 Trương Hữu Phúc (truonghuuphuc) September 22, 2025
3 WP Compress <= 6.30.30 - Unauthenticated Broken Authentication CVE-2025-47479 7.3 Trương Hữu Phúc (truonghuuphuc) July 3, 2025
4 WP Compress <= 6.30.30 - Cross-Site Request Forgery CVE-2025-47546 4.3 Snurkeburk, SashaRyba May 7, 2025
5 WP Compress <= 6.30.15 - Authenticated (Subscriber+) Missing Authorization via Multiple Functions CVE-2025-2110 8.8 mikemyers March 25, 2025
6 WP Compress <= 6.30.15 - Unauthenticated Server-Side Request Forgery via init Function CVE-2025-2109 5.8 mikemyers March 24, 2025
7 WP Compress – Instant Performance & Speed Optimization <= 6.30.03 - Reflected Cross-Site Scripting via custom_server Parameter CVE-2024-12047 6.1 vgo0 January 3, 2025
8 WP Compress – Image Optimizer [All-In-One] <= 6.20.13 - Reflected Cross-Site Scripting CVE-2024-47384 6.1 Le Ngoc Anh September 30, 2024
9 WP Compress – Image Optimizer [All-In-One] <= 6.20.01 - Open Redirect via css CVE-2023-6812 4.3 Krzysztof Zając May 13, 2024
10 WP Compress – Image Optimizer [All-In-One] <= 6.20.01 - Missing Authorization CVE-2024-4445 6.5 Lucio Sá May 13, 2024

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