GHSA-2cf5-4w76-r9qv
GHSA-2cf5-4w76-r9qv · Arbitrary Code Execution in handlebars
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
Versions of `handlebars` prior to 3.0.8 or 4.5.2 are vulnerable to Arbitrary Code Execution. The package's lookup helper fails to properly validate templates, allowing attackers to submit templates that execute arbitrary JavaScript in the system. It can be used to run arbitrary code in a server processing Handlebars templates or on a victim's browser (effectively serving as Cross-Site Scripting). The following template can be used to demonstrate the vulnerability: ```{{#with "constructor"}} {{#with split as |a|}} {{pop (push "alert('Vulnerable Handlebars JS');")}} {{#with (concat (lookup join (slice 0 1)))}} {{#each (slice 2 3)}} {{#with (apply 0 a)}} {{.}} {{/with}} {{/each}} {{/with}} {{/with}} {{/with}}``` ## Recommendation Upgrade to version 3.0.8, 4.5.2 or later.
CVSS 7.3 · Alta · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
handlebars npm
- Intervalos de versiones afectados
- SEMVER: < 3.0.8
Actualiza a 3.0.8
handlebars npm
- Intervalos de versiones afectados
- SEMVER: ≥ 4.0.0, < 4.5.2
Actualiza a 4.5.2