CVE-2025-58353 – Promptcraft Forge Studio: Complete Sanitizer Bypass Enables XSS via Overlapping Patterns

CVE ID : CVE-2025-58353

Published : Sept. 4, 2025, 8:15 p.m. | 57 minutes ago

Description : Promptcraft Forge Studio is a toolkit for evaluating, optimizing, and maintaining LLM-powered applications. All versions of Promptcraft Forge Studio sanitize user input using regex blacklists such as r`eplace(/javascript:/gi, ”)`. Because the package uses multi-character tokens and each replacement is applied only once, removing one occurrence can create a new dangerous token due to overlap. The “sanitized” value may still contain an executable payload when used in href/src (or injected into the DOM). There is currently no fix for this issue.

Severity: 8.2 | HIGH

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