CVE-2026-39170Public exploitNetwork attack vector

Administrative user changes via forged POST requests

Published Jun 9, 2026 · Updated Jun 9, 2026

Cross-site request forgery in SemCms 5.0 allows remote attackers to alter users through a crafted administrative POST request. The /admin/semcms_user.php endpoint accepts user-management requests from an authenticated browser without verifying that the administrator intentionally initiated them. Exploitation requires an authenticated administrator to visit attacker-controlled content, after which the forged request runs with that administrator's privileges.

CVSS severity6.3
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in SemCms 5.0 allows remote attackers to alter users through a crafted administrative POST request. The /admin/semcms_user.php endpoint accepts user-management requests from an authenticated browser without verifying that the administrator intentionally initiated them. Exploitation requires an authenticated administrator to visit attacker-controlled content, after which the forged request runs with that administrator's privileges.

The record

CVE
CVE-2026-39170
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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