What is CVE-2021-37634?

CVE-2021-37634 is a high-severity vulnerability in Vapor Leaf-kit, classified under Cross-site Scripting. CVSS score: 7.4/10. Published 2021-08-09.

How severe is CVE-2021-37634?

High severity. CVSS v3 base score is 7.4 out of 10.

XSS in Vapor Leaf-kit

CVE-2021-37634

Leafkit is a templating language with Swift-inspired syntax. Versions prior to 1.3.0 are susceptible to Cross-site Scripting (XSS) attacks. This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would n…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (54.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.

Affected products

Vapor Leaf-kit — versions < 1.3.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h (x_refsource_CONFIRM)
github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-37634?: CVE-2021-37634 is a high-severity vulnerability in Vapor Leaf-kit, classified under Cross-site Scripting. CVSS score: 7.4/10. Published 2021-08-09.
How severe is CVE-2021-37634?: High severity. CVSS v3 base score is 7.4 out of 10.