Search for vulnerabilities
| Vulnerability ID | VCID-xcuy-x2xk-6ya9 |
| Aliases |
GHSA-2cf5-4w76-r9qv
|
| Summary | Arbitrary Code Execution in handlebars 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. |
| Status | Published |
| Exploitability | None |
| Weighted Severity | None |
| Risk | None |
| Affected and Fixed Packages | Package Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1_qr | HIGH | https://github.com/advisories/GHSA-2cf5-4w76-r9qv |
| cvssv3.1 | 7.3 | https://www.npmjs.com/advisories/1316 |
| generic_textual | HIGH | https://www.npmjs.com/advisories/1316 |
| Reference id | Reference type | URL |
|---|---|---|
| https://www.npmjs.com/advisories/1316 | ||
| GHSA-2cf5-4w76-r9qv | https://github.com/advisories/GHSA-2cf5-4w76-r9qv |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
No EPSS data available for this vulnerability.
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2025-07-01T12:16:45.263104+00:00 | GithubOSV Importer | Import | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/09/GHSA-2cf5-4w76-r9qv/GHSA-2cf5-4w76-r9qv.json | 36.1.3 |