CVE-2026-54644: CubeCart: XSS via Anchor Tag Attribute Injection in gui.class.php Message System
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-04 15:41 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by GitHub_M, published 2026-09-17).
Weakness: CWE-79: Improper Neutralization of Input During Web Page Generation (‘Cross-site Scripting’)
How it can be exploited
Exploitable over the network with low attack complexity needing no privileges and a user must take an action. Impact: confidentiality low, integrity low, availability none. CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA assessment (SSVC): CISA assesses that a public proof of concept exists. Automatable: no. Technical impact: partial.
Public exploit evidence (Exploit Observer)
Exploit Observer found 1 Exploit-DB entry and 3 code repositories naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 6 references on Exploit Observer
Live scores
- EPSS
- 0.009
low predicted chance of attack - VEDAS
- 0.986
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- Suricata
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| cubecart v6 | version < 6.7.5 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
No fixed version or vendor advisory is listed in the CVE record yet. Watch the vendor’s security page.
How to detect it
Suricata rules (network detection)
1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-54644 CubeCart - Reflected XSS via Anchor in GUI Message. Add them to your Suricata rule set and reload.
Show the rules
# CVE-2026-54644 - CubeCart < 6.7.5 reflected XSS: _errorMessage in classes/gui.class.php
# used strip_tags($message, '<a>') which preserved anchor elements with unsafe href
# (javascript:) or event-handler attributes. Attacker input reflected into a GUI message
# carries the anchor; this matches the request carrying such an anchor payload.
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-54644 CubeCart - Reflected XSS via Anchor in GUI Message"; flow:established,to_server; http.uri; content:"index.php"; nocase; fast_pattern; pcre:"/(?:%3c|<)\s*a\b[^>]*(?:javascript(?::|%3a)|on(?:click|mouseover|error|load|focus)\s*(?:=|%3d))/i"; classtype:web-application-attack; reference:cve,CVE-2026-54644; reference:url,https://www.exploit.observer/?keyword=CVE-2026-54644&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=cubecart&match=exact; sid:1097804; rev:1;)
CVE-2026-54644.rules on GitHub
References
Other 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)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
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