Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2023-54423 Overview
OpenMage magento-lts before 20.2.0 contains a stored cross-site scripting vulnerability because the TinyMCE WYSIWYG editor fails to filter scripts in specially crafted HTML tags. Attackers can inject an img element with a malicious onmouseover attribute to execute scripts in the browsers of users viewing the rendered content.
Critical Impact
Affected Products
- OpenMage magento-lts: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-13: CVE-2023-54423 published to the National Vulnerability Database by disclosure@vulncheck.com
- 2026-11-13: last updated in the NVD database
Technical Details for CVE-2023-54423
Vulnerability Analysis
CVE-2023-54423 is a Security Vulnerability weakness (CWE-82) in OpenMage magento-lts. Based on its CVSS vector, the flaw can be reached over the network, needs some level of access, and relies on a user taking an action.
With a CVSS base score of 8.3 and an EPSS exploitation probability of 0.25 percent, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The vendor description states: OpenMage magento-lts before 20.2.0 contains a stored cross-site scripting vulnerability because the TinyMCE WYSIWYG editor fails to filter scripts in specially crafted HTML tags. Attackers can inject an img element with a malicious onmouseover attribute to execute scripts in the browsers of users viewing the rendered content.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs some level of access, and relies on a user taking an action. Attack complexity is low complexity.
No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Detection Methods for CVE-2023-54423
Detection Strategies
- Inventory every instance of OpenMage magento-lts and compare the running version with the affected range above.
- Check external attack surface scans for internet facing instances of the component.
- Run an authenticated vulnerability scan once your scanner ships a check for this CVE.
Monitoring Recommendations
- Forward OpenMage magento-lts application, access and audit logs to your SIEM for retrospective hunting.
- Alert on new processes, configuration changes or outbound connections from the affected service.
- Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.
How to Mitigate CVE-2023-54423
Immediate Actions Required
- Apply the fixed version of OpenMage magento-lts named in the vendor advisory.
- Prioritize internet facing and business critical instances first.
- Rescan after the change to confirm the exposure is closed.
Patch Information
Use the fixed version listed in the vendor advisory for OpenMage magento-lts.
Workarounds
- If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.
CWE References
Technical References
This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.
Frequently asked questions
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