CVE-2026-34096

Guardian Language-System XSS via name Parameter in designer.php

CVSS 4.8 MEDIUMEPSS 0.1%CWE-79

Vexday Risk Score

33Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS 4.8EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

01 Jul 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

Guardian language-system fails to sanitize the name GET parameter before outputting it into an HTML input value attribute in designer.php (line 57). An authenticated attacker can craft a URL containing script tags that execute in the victim's browser session.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected products

guardian · language-system

public PoCs found — 1

cve_referencegist.github.com/cyberinforepo/d5b2771d82e1b31b8fc1c33052e08dadunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://gist.github.com/cyberinforepo/d5b2771d82e1b31b8fc1c33052e08dad https://www.vulncheck.com/advisories/guardian-language-system-xss-via-designer-php-name-parameter