CVE-2026-53757

Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE

State: Published
Severity: 6.9 Medium
Published: Sep 4, 2026
Updated: Sep 8, 2026
Reserved: Jun 10, 2026

Description

Emlog is an open source website building system. In versions 2.6.29 and prior, the emUnZip() function extracts all ZIP entries via ZipArchive::extractTo() without validating entry paths for ../ traversal sequences. Only the first entry's subdirectory structure is checked. An attacker can overwrite arbitrary files on the server filesystem, including config.php for immediate RCE. At time of publication, there are no publicly known patches.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
emlogemlog	<= 2.6.29Affected

References

https://github.com/emlog/emlog/security/advisories/GHSA-gjj4-37r4-mf5g

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