What is CVE-2021-39286?

CVE-2021-39286 is a medium-severity vulnerability in Webrecorder Pywb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-18.

How severe is CVE-2021-39286?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Webrecorder Pywb

CVE-2021-39286

Webrecorder pywb before 2.6.0 allows XSS because it does not ensure that Jinja2 templates are autoescaped.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (49.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Webrecorder Pywb
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2021-39286?: CVE-2021-39286 is a medium-severity vulnerability in Webrecorder Pywb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-18.
How severe is CVE-2021-39286?: Medium severity. CVSS v3 base score is 6.1 out of 10.