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CVE-2025-47786: Emlog vulnerable to Stored Cross-site Scripting

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-05-15 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• emlog: 2.5.13

References

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

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