CVE-2021-20253

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-09 · updated 2026-06-17
Weakness: CWE-552

Description

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.

Affected products

Tower: before 3.6.7; from 3.7.0 before 3.7.5; from 3.8.0 before 3.8.2 — fixed in 3.6.7, 3.7.5, 3.8.2

How to fix

Upgrade to a fixed version: Tower 3.6.7, 3.7.5, 3.8.2. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1928847
https://bugzilla.redhat.com/show_bug.cgi?id=1928847

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