CVE-2023-1509Network attack vector

Remote code execution via nonce-free AJAX file operations

Published Mar 29, 2023 · Updated Apr 8, 2026

Cross-site request forgery in German Mesky GMAce 1.5.2 and earlier allows remote attackers to modify site files via a forged request. The gmace_manager_server handler registered as wp_ajax_gmace_manager accepts file-management requests without verifying a WordPress nonce, allowing attacker-selected create, overwrite, or delete operations. Exploitation requires an authenticated site administrator to trigger the forged request, after which modified PHP files can provide remote code execution.

CVSS severity8.8
High
EPSS probability0.59%
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 German Mesky GMAce 1.5.2 and earlier allows remote attackers to modify site files via a forged request. The gmace_manager_server handler registered as wp_ajax_gmace_manager accepts file-management requests without verifying a WordPress nonce, allowing attacker-selected create, overwrite, or delete operations. Exploitation requires an authenticated site administrator to trigger the forged request, after which modified PHP files can provide remote code execution.

The record

CVE
CVE-2023-1509
Published
Mar 29, 2023
Updated
Apr 8, 2026
Vendor
German Mesky
Product
GMAce
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

German Mesky · GMAceversion=0 <=1.5.2

Published CVSS scores

8.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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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