CVE-2021-20253
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape...
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- Record
CVE-2021-20253- CVSS 3.1
- 6.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 3.5 Low
AV:L/AC:H/Au:S/C:P/I:P/A:P - Weakness
- CWE-552
- Updated
- 2026-11-02
CVE List No score
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- Record
CVE-2021-20253- Weakness
- CWE-552
- Updated
- 2026-11-02
EUVDEUVD-2021-7691 No score
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- Record
EUVD-2021-7691- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rr45-4xhx-rxc8 No score
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape...
A flaw was found in ansible-tower. The default installation is vulnerable to Job Isolation escape allowing an attacker to elevate the privilege from a low privileged user to the awx user from outside the isolated environment. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
- Record
GHSA-rr45-4xhx-rxc8- Weakness
- CWE-552
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | mbadanoiu/CVE-2021-20253 | 2023-11-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-20253 is a medium vulnerability (CVSS 6.7) in Red Hat Ansible-tower, published March 9, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.