CVE-2024-21520VulnerabilityPublished 27 Sep 2024Updated 6 Aug 2026

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update

Affects Red HatSource GCVE Database

Mentioned vulnerabilities

Not known to be exploited · fixed in Red Hat package updates : update Red Hat when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 1.1% chance of exploitation in 30 days – higher than 66% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.5.12

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Sep 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected Red Hat Red Hat Ansible Automation Platform Red Hat Ansible Automation Platform 2.4 for RHEL 9 Red Hat Ansible Automation Platform 2.4 for RHEL 8	Fixed in–

AI-suggested

Red Hat has released an official fix in automation-controller version 4.5.12 that addresses these vulnerabilities. Users of Red Hat Ansible Automation Platform 2.4 should update to automation-controller 4.5.12 or later to remediate these issues. The vendor advisory provides detailed package information and update instructions. No additional mitigation steps are indicated beyond applying the official update.

Description

Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to individual teams, while automation developers retain the freedom to write tasks that leverage existing knowledge without the overhead. Ansible Automation Platform makes it possible for users across an organization to share, vet, and manage automation content by means of a simple, powerful, and agentless language. Security Fix(es): * automation-controller: djangorestframework: Cross-site Scripting (XSS) via break_long_headers (CVE-2024-21520) * automation-controller: twisted: Reflected XSS via HTML Injection in Redirect Response (CVE-2024-41810) * automation-controller: urllib3: proxy-authorization request header is not stripped during cross-origin redirects (CVE-2024-37891) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Updates and fixes for automation controller: * Fixed Galaxy credentials to be correctly ordered when assigning them using 'ansible.controller.organization' (AAP-31398) * Fixed gather analytics failure due to missing '_unpartitioned_main_jobevent' table (AAP-31053) * automation-controller has been updated to 4.5.12

Impact

The vulnerabilities allow cross-site scripting attacks and improper handling of proxy-authorization headers, which could lead to security issues such as unauthorized script execution in user browsers and potential leakage of sensitive proxy credentials during redirects. These issues affect the automation-controller component of Red Hat Ansible Automation Platform 2.4. Red Hat rates the overall security impact as moderate. There are no known exploits in the wild at the time of this advisory.

Summary

This advisory covers three security vulnerabilities in Red Hat Ansible Automation Platform 2.4's automation-controller component: CVE-2024-21520 is a cross-site scripting (XSS) vulnerability via break_long_headers in djangorestframework; CVE-2024-41810 is a reflected XSS via HTML injection in redirect responses in twisted; CVE-2024-37891 involves the proxy-authorization request header not being stripped during cross-origin redirects in urllib3. Red Hat has released automation-controller version 4.5.12 to fix these issues. The update also addresses other bug fixes such as correct ordering of Galaxy credentials and analytics gathering failures. The advisory rates the security impact as moderate and provides no CVSS scores directly but references CVE pages for details.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-669Incorrect Resource Transfer Between Spheres (opens in a new tab)
Class weakness
The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Jul 2026, 01:27 UTC

WeaknessesCWE-79, CWE-669

Technical details

References

Community reviews

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