- cvss
- 6.5
- version 3.1, GitHub
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- —
- no score, EPSS covers CVEs only
- public exploits
- 0
- none known
Summary
Versions of `helmet-csp` before to 2.9.1 are vulnerable to a Configuration Override affecting the application's Content Security Policy (CSP). The package's browser sniffing for Firefox deletes the `default-src` CSP policy, which is the fallback policy. This allows an attacker to remove an application's default CSP, possibly rendering the application vulnerable to Cross-Site Scripting.
## Recommendation
Upgrade to version 2.9.1 or later. Setting the `browserSniff` configuration to `false` in vulnerable versions also mitigates the issue.
Patch / fix
Is GHSA-c3m8-x3cg-qm2c 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.
Check with FencerCVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | helmet-csp | >=1.2.2, <2.9.1 |
2.9.1 |
References
Sources
- GitHub Advisory GHSA-c3m8-x3cg-qm2c
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