Vulnerability · Published Sep 17, 2026 · Assigned by GitHub_M

CVE-2026-54644CubeCart: XSS via Anchor Tag Attribute Injection in gui.class.php Message System

Medium 6.1

In plain English

A medium-severity cross-site scripting in v6 from cubecart. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.9%top 40.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

CubeCart is an ecommerce software solution. Prior to 6.7.5, the _errorMessage method in classes/gui.class.php uses strip_tags to permit anchor elements in error, information, and warning messages while retaining unsafe href values and onclick event handlers. Attacker-controlled search or input data that reaches a GUI message can carry a javascript: URI or event handler through the filter, and viewing or interacting with the rendered anchor executes JavaScript in the victim's browser session, enabling session exposure or unauthorized application actions. This issue is fixed in version 6.7.5.

Affected products (as reported)

Vendor	Product	Versions
cubecart	v6	< 6.7.5

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/cubecart/v6/security/advisories/GHSA-v55x-fh73-29vq x_refsource_CONFIRM
https://github.com/cubecart/v6/commit/7c4c0081fd346578a95738f480ef647116ee1c82 x_refsource_MISC
https://github.com/cubecart/v6/blob/6.7.5/admin/sources/release_notes/6.7.5.inc.php x_refsource_MISC
https://github.com/cubecart/v6/releases/tag/6.7.5 x_refsource_MISC