CVE-2026-34097: Guardian Language-System XSS via id Parameter in text_file.php

Severity: medium (CVSS 4.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-01 · updated 2026-10-25
Weakness: CWE-79

Description

Guardian language-system fails to sanitize the id GET parameter before inserting it into multiple HTML form action attributes in text_file.php (lines 94, 101, 323, 403, 826, 852). An authenticated attacker can craft a URL that injects script tags executing in the victim's browser session.

Affected products

guardian language-system: all versions

References

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

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