What’s Vulnerable › Vulnerabilities

CVE-2026-104081: KodExplorer < 4.55 Path Traversal via unzip_pre_name() ZIP Extraction

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-09 · updated 2026-10-09
• Weakness: CWE-22

Description

KodExplorer before 4.55 contains a path traversal vulnerability in the unzip_pre_name() function within app/function/helper.function.php, where a single non-recursive str_replace() sanitization pass can be bypassed using crafted filenames like "....//", combined with PclZip's extract() call in KodArchive.class.php lacking the PCLZIP_OPT_EXTRACT_DIR_RESTRICTION option. Authenticated attackers can upload a malicious ZIP archive with traversal sequences to overwrite arbitrary files such as core JavaScript assets, enabling stored XSS that leads to admin account takeover and subsequent remote code execution via unrestricted PHP file upload.

Affected products

• kalcaddle KodExplorer: before 4.55 — fixed in 4.55

How to fix

Upgrade to a fixed version: kalcaddle KodExplorer 4.55. Check the vendor advisory for mitigations.

References

• https://github.com/kalcaddle/KodExplorer/releases/tag/4.55
• https://www.vulncheck.com/advisories/kodexplorer-path-traversal-via-unzip-pre-name-zip-extraction

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