CVE-2023-23617Network attack vector

Request hangs via restored empty filter result

Published Jan 27, 2023 · Updated Mar 10, 2025

Denial of service in OpenMage LTS before 19.4.22 and 20.0.0 through 20.0.18 allows remote authenticated users to hang requests. Mage_Core_Model_Input_Filter_MaliciousCode::filter repeats replacement until no matches remain, but treats an empty result as false and restores the original input, so input fully removed by a filter expression is processed forever. High-privilege application access is required, and each trigger occupies a PHP worker without affecting confidentiality or integrity.

CVSS severity4.9
Medium
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in OpenMage LTS before 19.4.22 and 20.0.0 through 20.0.18 allows remote authenticated users to hang requests. Mage_Core_Model_Input_Filter_MaliciousCode::filter repeats replacement until no matches remain, but treats an empty result as false and restores the original input, so input fully removed by a filter expression is processed forever. High-privilege application access is required, and each trigger occupies a PHP worker without affecting confidentiality or integrity.

The record

CVE
CVE-2023-23617
Published
Jan 27, 2023
Updated
Mar 10, 2025
Vendor
OpenMage
Product
OpenMage LTS
Classifications
CWE-835, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2025Record 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=< 19.4.22
  2. Affected versionversion=>= 20.0.0, < 20.0.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenMage · OpenMage LTSversion=< 19.4.22; version=>= 20.0.0, < 20.0.19

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.9GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

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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