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CVE-2026-53757— Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE

Quick assessment

Affected
emlog emlog
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Emlog 是一个开源的网站构建系统。在 2.6.29 及之前版本中， 函数通过 提取所有 ZIP 条目时，未对条目路径进行校验以检测 路径遍历序列，仅对第一个条目的子目录结构进行了检查。攻击者可以利用该漏洞覆盖服务器文件系统中的任意文件，包括 ，从而实现即时远程代码执行（RCE）。在公告发布时，尚无公开已知的补丁。

CVSS 6.9 · Medium EPSS 0.03% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
emlog emlog <= 2.6.29 affected
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I. Basic Information for CVE-2026-53757

Vulnerability Information
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Vulnerability Title
Emlog: Zip Slip Path Traversal in Plugin/Template ZIP Upload Enables RCE
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
emlog emlog <= 2.6.29 -

II. Public POCs for CVE-2026-53757

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III. Intelligence Information for CVE-2026-53757

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Vendor Advisories for CVE-2026-53757 (1)

Same Patch Batch · emlog · 2026-09-04 · 4 CVEs total

CVE-2026-53758 8.7 HIGH Emlog: Stored XSS via Parsedown Markdown Processing - Raw HTML Not Sanitized
CVE-2026-73848 6.9 MEDIUM Emlog: Stored XSS via Tag Name in Article Editor
CVE-2026-53756 4.9 MEDIUM Emlog Blind SQL Injection via Authentication Cookie

IV. Related Vulnerabilities

Same product: emlog
Same vendor: emlog
Same weakness: CWE-22

V. Comments for CVE-2026-53757

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