CVE-2025-66452 — LibreChat's lack of JSON parsing error handling can lead to XSS
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 in…
Published: 2025-12-11 · CVSS: 5.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7