jhuckaby Cronicle up to 0.9.118 Activity Log Activity.js full_name cross site scripting

Summaryinfo

A vulnerability was found in jhuckaby Cronicle up to 0.9.118. It has been rated as problematic. The impacted element is an unknown function of the file htdocs/js/pages/admin/Activity.js of the component Activity Log. The manipulation of the argument full_name leads to cross site scripting. This vulnerability is traded as CVE-2026-55562. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in jhuckaby Cronicle up to 0.9.118. This issue affects an unknown function of the file htdocs/js/pages/admin/Activity.js of the component Activity Log. The manipulation of the argument full_name with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Cronicle is a multi-server task scheduler and runner, with a web based front-end UI. Prior to 0.9.119, the administrator Activity Log in htdocs/js/pages/admin/Activity.js concatenates the attacker-controlled item.user.full_name value into HTML without applying encode_entities and inserts the result through this.div.html. The bundled pixl-server-user input filter can be bypassed by a tag containing a line break because its regular expression does not match newlines. An authenticated non-administrator can update the attacker's own name through /api/user/update using a valid session and current password; when free_accounts is enabled, an anonymous attacker can instead plant the name during self-registration. The stored name executes script in an administrator's session when the Activity Log is opened, enabling administrator takeover and subsequent command execution through privileged Cronicle features. This issue is fixed in version 0.9.119.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-55562 since 06/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 0.9.119 eliminates this vulnerability.

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Productinfo

Vendor

• jhuckaby

Name

• Cronicle

Version

• 0.9.118

Website

• Product: https://github.com/jhuckaby/Cronicle/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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