CVE-2025-58353

Promptcraft Forge Studio: Complete Sanitizer Bypass Enables XSS via Overlapping Patterns

Published Sep 4, 2025 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-26866 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.
History
Type Values Removed Values Added
First Time appeared Promptcraft-forge-studio Project
Promptcraft-forge-studio Project promptcraft-forge-studio
Vendors & Products Promptcraft-forge-studio Project
Promptcraft-forge-studio Project promptcraft-forge-studio
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Promptcraft Forge Studio: Complete Sanitizer Bypass Enables XSS via Overlapping Patterns
Weaknesses CWE-184
CWE-20
CWE-79
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 4, 2025, 8:13 PM
Reserved
Aug 29, 2025, 4:19 PM
Status
Deferred
Published
Sep 4, 2025, 8:15 PM
Modified
Jun 17, 2026, 9:44 AM