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VulnerabilityPublished Updated

CVE-2024-40520: SeaCMS · Improper Input Validation

Source CVE Database V5

0

Not known to be exploited · CVSS 8.8 High.

Data as of 26 Oct 2026, 11:07 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.0% chance of exploitation in 30 days – higher than 64% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Jul 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

To mitigate CVE-2024-40520, organizations should immediately restrict access to the SeaCMS administrative interface using strong authentication mechanisms, such as multi-factor authentication and IP whitelisting. Until an official patch is released, administrators should audit and sanitize all inputs to admin_config_mark.php to prevent injection of malicious data. Implementing web application firewalls (WAFs) with custom rules to detect and block suspicious payloads targeting the vulnerable endpoint can reduce exploitation risk. Regularly monitor logs for unusual activity or unauthorized command execution attempts. Segregate the CMS environment from critical internal networks to limit potential lateral movement. Backup configuration files and website data frequently to enable recovery in case of compromise. Stay updated with SeaCMS vendor announcements for patches or security advisories and apply them promptly once available. Consider employing runtime application self-protection (RASP) tools to detect and prevent exploitation attempts in real time.

Description

SeaCMS 12.9 has a remote code execution vulnerability. The vulnerability is caused by admin_config_mark.php directly splicing and writing the user input data into inc_photowatermark_config.php without processing it, which allows authenticated attackers to exploit the vulnerability to execute arbitrary commands and obtain system permissions.

References

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