GHSA-2cf5-4w76-r9qv
GHSA-2cf5-4w76-r9qv · Arbitrary Code Execution in handlebars
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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 · Hoch · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: node
Betroffene Produkte und Versionen
handlebars npm
- Betroffene Versionsbereiche
- SEMVER: < 3.0.8
Auf 3.0.8 aktualisieren
handlebars npm
- Betroffene Versionsbereiche
- SEMVER: ≥ 4.0.0, < 4.5.2
Auf 4.5.2 aktualisieren