CVE-2025-47786: emlog XSS — Exploit & Fix

Description

Emlog is an open source website building system. Version 2.5.13 has a stored cross-site scripting vulnerability that allows any registered user to construct malicious JavaScript, inducing all website users to click. In `/admin/comment.php`, the parameter `perpage_num` is not validated and is directly stored in the `admin_commend_perpage_num` field of the `emlog_options` table in the database. Moreover, the output is not filtered, resulting in the direct output of malicious code. As of time of publication, it is unclear if a patch exists.

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CVSS v3.1 Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
emlog	emlog	All

References

Advisories & Patches

https://github.com/emlog/emlog/security/advisories/GHSA-82qc-9vg7-2c6c https://github.com/emlog/emlog/security/advisories/GHSA-82qc-9vg7-2c6c

Exploits

https://github.com/emlog/emlog/security/advisories/GHSA-82qc-9vg7-2c6c https://github.com/emlog/emlog/security/advisories/GHSA-82qc-9vg7-2c6c

Frequently Asked Questions

What is CVE-2025-47786? +

Emlog is an open source website building system. Version 2.5.13 has a stored cross-site scripting vulnerability that allows any registered user to construct malicious JavaScript, inducing all website users to click. In `/admin/comment.php`, the parameter `perpage_num` is not validated and is directly stored in the `admin_commend_perpage_num` field of the `emlog_options` table in the database. Moreover, the output is not filtered, resulting in the direct output of malicious code. As of time of publication, it is unclear if a patch exists. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2025-47786? +

CVE-2025-47786 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-47786? +

CVE-2025-47786 affects products from emlog, specifically: emlog. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-47786? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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