Remote code execution via the `pretty` option.
Impact
If a remote attacker was able to control the pretty option of the pug compiler, e.g. if you spread a user provided object such as the query parameters of a request into the pug template inputs, it was possible for them to achieve remote code execution on the node.js backend.
Patches
Upgrade to pug@3.0.1 or pug-code-gen@3.0.2 or pug-code-gen@2.0.3, which correctly sanitise the parameter.
Workarounds
If there is no way for un-trusted input to be passed to pug as the pretty option, e.g. if you compile templates in advance before applying user input to them, you do not need to upgrade.
References
Original report: https://github.com/pugjs/pug/issues/3312
For more information
If you believe you have found other vulnerabilities, please DO NOT open an issue. Instead, you can follow the instructions in our Security Policy
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de npm | pug | < 3.0.1 | 3.0.1 |
| Paquete de npm | pug-code-gen | < 2.0.3, >= 3.0.0, < 3.0.2 | 2.0.3, 3.0.2 |
Referencias
- https://github.com/pugjs/pug/security/advisories/GHSA-p493-635q-r6gr
- https://nvd.nist.gov/vuln/detail/CVE-2021-21353
- https://github.com/pugjs/pug/issues/3312
- https://github.com/pugjs/pug/pull/3314
- https://github.com/pugjs/pug/commit/991e78f7c4220b2f8da042877c6f0ef5a4683be0
- https://github.com/pugjs/pug/releases/tag/pug%403.0.1
- https://www.npmjs.com/package/pug
- https://www.npmjs.com/package/pug-code-gen
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N- Debilidad (CWE)
CWE-74, CWE-94- Plataforma
- npm
- Paquete
pug, pug-code-gen- Publicada
- 03.03.2021
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-p493-635q-r6gr - CC BY 4.0
Historial de vulnerabilidades: pug
Todas las vulnerabilidades publicadas de este paquete (Paquete de npm), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 2
- Primera → última
- 03.2021 05.2024
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Media 2
Divulgaciones por año
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 0
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Remote code execution via the `pretty` option. esta entrada
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