File Overwrite Vulnerability in Emlog Website Building System by Emlog
CVE-2026-53757

6.9MEDIUM

Key Information:

Vendor

Emlog

Status
Emlog
Vendor
CVE Published:
4 September 2026

What is CVE-2026-53757?

Emlog, an open-source website building system, contains a vulnerability in versions 2.6.29 and earlier related to the emUnZip() function. This function utilizes ZipArchive::extractTo() for extracting ZIP entries, but it fails to fully validate entry paths against directory traversal sequences. Consequently, only the directory structure of the first entry is validated. This oversight allows attackers to exploit the vulnerability to overwrite arbitrary files on the server, including crucial configuration files such as config.php, which can lead to remote code execution. As of now, there are no publicly available patches for this vulnerability, emphasizing the urgent need for system administrators to secure their installations of Emlog.

Affected Version(s)

emlog <= 2.6.29

References

https://github.com/emlog/emlog/security/advisories/GHSA-g...
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CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.