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CVE-2021-39132

27
FAUCET Score

CVE-2021-39132 is a critical vulnerability affecting Rundeck Community and Enterprise editions prior to versions 3.3.14 and 3.4.3. It allows an authenticated attacker to achieve remote code execution by uploading specially crafted plugin or ACL policy YAML files, or an untrusted project archive. With a CVSS score of 8.8 (High), this vulnerability poses a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, organizations using affected Rundeck versions should prioritize patching to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.3.14CPE matchmatch criteria
cpe:2.3:a:pagerduty:rundeck:*:*:*:*:community:*:*:*
< 3.3.14CPE matchmatch criteria
cpe:2.3:a:pagerduty:rundeck:*:*:*:*:enterprise:*:*:*
>= 3.4.0, < 3.4.3CPE matchmatch criteria
cpe:2.3:a:pagerduty:rundeck:*:*:*:*:community:*:*:*
>= 3.4.0, < 3.4.3CPE matchmatch criteria
cpe:2.3:a:pagerduty:rundeck:*:*:*:*:enterprise:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.43%
Probability of exploitation in next 30 days
EPSS Percentile
70.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0143 is in the 68th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.rundeck:rundeck-coreFixed in: 3.4.3
mavenpatch availablevia ghsa
Product: org.rundeck:rundeck-coreFixed in: 3.3.14

Vendor Advisories (1)

mavenGHSA-q4rf-3fhx-88pfmedium

YAML deserialization can run untrusted code

Sep 1, 2021

References

github.com / rundeck/rundeck/commit/850d12e21d22833bc148b7f458d7cb5949f829b6
PatchThird Party Advisory
github.com / rundeck/rundeck/security/advisories/GHSA-q4rf-3fhx-88pf
Third Party Advisory