Concrete CMS 9.0.0 through 9.5.2 is vulnerable to Insecure direct object reference (IDOR) in the Express saved search preset delete and edit dialogs . (CVE-2026-18423)
Concrete CMS versions 9.0.0 through 9.5.2 contain an Insecure Direct Object Reference (IDOR) vulnerability in the Express saved search preset delete and edit dialogs. Authenticated users with view permission on a single Express entity can delete or rename saved search presets belonging to other Express entities without proper authorization. Renamed presets are displayed to users of the targeted entity, potentially enabling defacement or social engineering. The vulnerability has a low severity rating with a CVSS v4.0 score of 2.1.
AI Analysis
Technical Summary
CVE-2026-18423 describes an IDOR vulnerability in Concrete CMS versions 9.0.0 through 9.5.2 affecting the Express saved search preset delete and edit dialogs. This flaw allows an authenticated user with limited permissions (view only on one Express entity) to permanently delete or rename saved search presets owned by other Express entities without authorization. The renamed preset name is displayed to users of the targeted entity, which could facilitate defacement or social engineering attacks. The vulnerability was reported by Yalguun Tumenkhuu and assigned a CVSS v4.0 score of 2.1, indicating low severity.
Potential Impact
An authenticated user with view permission on a single Express entity can delete or rename saved search presets for other entities without permission. This unauthorized modification is permanent with no undo option. Renamed presets are displayed to users of the targeted entity, which may lead to defacement or social engineering. The impact is limited by the requirement for authenticated access and the low CVSS score.
Mitigation Recommendations
No official patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions carefully and monitor for unauthorized changes to saved search presets.
Concrete CMS 9.0.0 through 9.5.2 is vulnerable to Insecure direct object reference (IDOR) in the Express saved search preset delete and edit dialogs . (CVE-2026-18423)
Description
Concrete CMS versions 9.0.0 through 9.5.2 contain an Insecure Direct Object Reference (IDOR) vulnerability in the Express saved search preset delete and edit dialogs. Authenticated users with view permission on a single Express entity can delete or rename saved search presets belonging to other Express entities without proper authorization. Renamed presets are displayed to users of the targeted entity, potentially enabling defacement or social engineering. The vulnerability has a low severity rating with a CVSS v4.0 score of 2.1.
CVSS v4.0
Affected software
pkg:composer/concrete5/concrete5Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18423 describes an IDOR vulnerability in Concrete CMS versions 9.0.0 through 9.5.2 affecting the Express saved search preset delete and edit dialogs. This flaw allows an authenticated user with limited permissions (view only on one Express entity) to permanently delete or rename saved search presets owned by other Express entities without authorization. The renamed preset name is displayed to users of the targeted entity, which could facilitate defacement or social engineering attacks. The vulnerability was reported by Yalguun Tumenkhuu and assigned a CVSS v4.0 score of 2.1, indicating low severity.
Potential Impact
An authenticated user with view permission on a single Express entity can delete or rename saved search presets for other entities without permission. This unauthorized modification is permanent with no undo option. Renamed presets are displayed to users of the targeted entity, which may lead to defacement or social engineering. The impact is limited by the requirement for authenticated access and the low CVSS score.
Mitigation Recommendations
No official patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions carefully and monitor for unauthorized changes to saved search presets.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7vc7-m9pm-w64f
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18423"]
- Database Specific Severity
- LOW
- Cvss Version
- 4.0
Threat ID: 6aaa07e855bf5e2cf5ea3457
Added to database: 09/16/2026, 03:07:20 UTC
Last enriched: 09/16/2026, 04:57:44 UTC
Last updated: 09/16/2026, 22:01:33 UTC
Views: 3
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