Vulnerability Details CVE-2025-66452
LibreChat is a ChatGPT clone with additional features. In versions 0.8.0 and below, there is no handler for JSON parsing errors; SyntaxError from express.json() includes user input in the error message, which gets reflected in responses. User input (including HTML/JavaScript) can be exposed in error responses, creating an XSS risk if Content-Type isn't strictly enforced. This issue does not have a fix at the time of publication.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.0%
CVSS Severity
CVSS v3 Score 6.1
Products affected by CVE-2025-66452
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cpe:2.3:a:librechat:librechat:-
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cpe:2.3:a:librechat:librechat:0.0.1
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cpe:2.3:a:librechat:librechat:0.0.2
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cpe:2.3:a:librechat:librechat:0.0.3
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cpe:2.3:a:librechat:librechat:0.0.4
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cpe:2.3:a:librechat:librechat:0.0.5
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cpe:2.3:a:librechat:librechat:0.0.6
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cpe:2.3:a:librechat:librechat:0.1.0
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cpe:2.3:a:librechat:librechat:0.1.1
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cpe:2.3:a:librechat:librechat:0.2.0
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cpe:2.3:a:librechat:librechat:0.3.0
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cpe:2.3:a:librechat:librechat:0.3.3
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cpe:2.3:a:librechat:librechat:0.4.0
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cpe:2.3:a:librechat:librechat:0.4.1
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cpe:2.3:a:librechat:librechat:0.4.2
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cpe:2.3:a:librechat:librechat:0.4.3
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cpe:2.3:a:librechat:librechat:0.4.4
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cpe:2.3:a:librechat:librechat:0.4.5
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cpe:2.3:a:librechat:librechat:0.4.6
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cpe:2.3:a:librechat:librechat:0.4.7
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cpe:2.3:a:librechat:librechat:0.4.8
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cpe:2.3:a:librechat:librechat:0.5.0
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cpe:2.3:a:librechat:librechat:0.5.1
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cpe:2.3:a:librechat:librechat:0.5.2
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cpe:2.3:a:librechat:librechat:0.5.3
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cpe:2.3:a:librechat:librechat:0.5.4
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cpe:2.3:a:librechat:librechat:0.5.5
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cpe:2.3:a:librechat:librechat:0.5.6
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cpe:2.3:a:librechat:librechat:0.5.7
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cpe:2.3:a:librechat:librechat:0.5.8
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cpe:2.3:a:librechat:librechat:0.5.9
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cpe:2.3:a:librechat:librechat:0.6.0
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cpe:2.3:a:librechat:librechat:0.6.1
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cpe:2.3:a:librechat:librechat:0.6.10
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cpe:2.3:a:librechat:librechat:0.6.5
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cpe:2.3:a:librechat:librechat:0.6.6
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cpe:2.3:a:librechat:librechat:0.6.9
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cpe:2.3:a:librechat:librechat:0.7.0
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cpe:2.3:a:librechat:librechat:0.7.1
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cpe:2.3:a:librechat:librechat:0.7.2
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cpe:2.3:a:librechat:librechat:0.7.3
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cpe:2.3:a:librechat:librechat:0.7.4
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cpe:2.3:a:librechat:librechat:0.7.5
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cpe:2.3:a:librechat:librechat:0.7.6
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cpe:2.3:a:librechat:librechat:0.7.7
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cpe:2.3:a:librechat:librechat:0.7.8
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cpe:2.3:a:librechat:librechat:0.7.9
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cpe:2.3:a:librechat:librechat:0.8.0