CVE-2026-96739: SEMCMS KindEditor Upload upload_json.php cross site scripting
A flaw has been found in SEMCMS up to 4.2. Affected by this issue is some unknown functionality of the file /Edit/php/uploadjson.php of the component KindEditor Upload Interface. This manipulation of the argument imgFile causes cross site scripting. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected Software
Event History
Frequently Asked Questions
Which deployments should be considered exposed?
SEMCMS installations up to version 4.2 are identified as affected. The vulnerable functionality is in the KindEditor Upload Interface endpoint at /Edit/php/upload_json.php.
What does an attacker need to exploit this issue?
The attack can be initiated remotely and does not require privileges according to the supplied vector. Exploitation requires user interaction, meaning a victim must interact with attacker-controlled content for the cross-site scripting to take effect.
Is there public exploit information available?
Yes. An exploit has been published and may be used, increasing the likelihood of attempted exploitation.
Is a vendor fix or workaround available?
The provided information does not identify a fix or workaround. It states that the vendor was contacted but did not respond.