Security readout for executives and security teams
Plain-English summary
CVE-2021-39133 is a high-severity CSRF issue in Rundeck. In affected versions, an administrator with access to the system resource type could be exposed to an attack that causes the Rundeck server to run untrusted code. Patched versions are available.
Executive priority
Prioritize remediation for any Rundeck instance used to automate production or privileged infrastructure. The issue is high severity, patched, and can affect server-side code execution, but the provided evidence does not show known active exploitation.
Technical view
Rundeck before 3.3.14 and 3.4.0 through before 3.4.3 are affected by CWE-352. The advisory describes a CSRF condition involving admin access to the system resource type, with potential server-side execution of untrusted code across all Rundeck editions. CVSS is 7.2 high.
Likely exposure
Exposure is limited to organizations running Rundeck versions older than 3.3.14, or 3.4.x versions before 3.4.3. The source bundle identifies only the Rundeck product and all editions; it does not identify other affected products or hosted services.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation evidence. The risk depends on an affected Rundeck deployment and an admin-level system resource user being exposed to CSRF conditions.
Researcher notes
The source bundle supports affected ranges, CWE-352, high CVSS 7.2, admin-system-resource precondition, and patched versions. It does not provide exploit details, active exploitation evidence, or broader product impact. Treat compensating controls as temporary until upgraded.
Mitigation direction
- Upgrade Rundeck to version 3.3.14 or 3.4.3, or later supported releases.
- Review the Rundeck GitHub advisory before applying environment-specific controls.
- Limit admin access to the system resource type to required users only.
- Reduce unnecessary exposure of the Rundeck web console while upgrades are pending.
Validation and detection
- Inventory Rundeck deployments and record exact installed versions.
- Confirm no deployment is below 3.3.14 or between 3.4.0 and 3.4.2.
- Identify users with admin access to the system resource type.
- Review recent administrative activity for unexpected server-side job or configuration changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-39133 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/rundeck/rundeck/security/advisories/GHSA-3jmw-c69h-426cCVE reference · x_refsource_CONFIRM
- https://github.com/rundeck/rundeck/commit/67c4eedeaf9509fc0b255aff15977a5229ef13b9CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.