Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 10epss 1.2%
exploitation probability
1.2%top 33% of all CVEs
observed exploitation
nono source reports it
Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controlled template could traverse constructor and prototype properties to execute JavaScript in the host Node.js process. This issue is fixed in versions 0.1.5 and 2.0.0-beta.5.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
microsoft · promptyReferences
https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19ehttps://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89fhttps://github.com/microsoft/prompty/pull/404https://github.com/microsoft/prompty/pull/405https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5