What is CVE-2021-39133?

CVE-2021-39133 is a high-severity vulnerability in Pagerduty Rundeck, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.2/10. Published 2021-08-30.

How severe is CVE-2021-39133?

High severity. CVSS v3 base score is 7.2 out of 10.

CSRF in Pagerduty Rundeck

CVE-2021-39133

Rundeck is an open source automation service with a web console, command line tools and a WebAPI. Prior to version 3.3.14 and version 3.4.3, a user with `admin` access to the `system` resource type is potentially vulnerable to a CSRF attack that could cause the server to run untrusted code on all Rundeck editions. Patches are available in Rundeck versions 3.4.3 and 3.3.14.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-08-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (36.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Pagerduty Rundeck
Rundeck — versions < 3.3.14, >= 3.4.0, < 3.4.3

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/rundeck/rundeck/security/advisories/GHSA-3jmw-c69h-426c (Third Party Advisory)
github.com/rundeck/rundeck/commit/67c4eedeaf9509fc0b255aff15977a5229ef13b9 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-39133?: CVE-2021-39133 is a high-severity vulnerability in Pagerduty Rundeck, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.2/10. Published 2021-08-30.
How severe is CVE-2021-39133?: High severity. CVSS v3 base score is 7.2 out of 10.