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Fencer Intel
high —

GHSA-q2c6-c6pm-g3gh json

Arbitrary Code Execution in handlebars

published 6y ago modified 2mo ago

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

Versions of `handlebars` prior to 3.0.8 or 4.5.3 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 is due to an incomplete fix for a [previous issue](https://www.npmjs.com/advisories/1316). This vulnerability 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).

## Recommendation

Upgrade to version 3.0.8, 4.5.3 or later.

Patch / fix

  • npm handlebars 3.0.8, 4.5.3

Is GHSA-q2c6-c6pm-g3gh in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Affected packages

ecosystem package affected fixed in
npm handlebars
<3.0.8
>=4.0.0, <4.5.3
3.0.8
4.5.3

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.