CVE-2021-45229Network attack vector

Reflected XSS via origin query argument

Published Feb 25, 2022 · Updated Aug 4, 2024

Cross-site scripting in Apache Airflow 2.2.3 and earlier allows remote attackers to execute script in a user's browser via the origin query argument. The Trigger DAG with config template placed the origin value directly inside an inline onclick JavaScript URL, allowing crafted HTML or script to execute when the page is rendered. Exploitation requires a victim to open the malicious link, and the demonstrated impact is execution in that user's web session with integrity and confidentiality exposure bounded by the victim's permissions.

CVSS severity6.1
Medium
EPSS probability2.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Apache Airflow 2.2.3 and earlier allows remote attackers to execute script in a user's browser via the origin query argument. The Trigger DAG with config template placed the origin value directly inside an inline onclick JavaScript URL, allowing crafted HTML or script to execute when the page is rendered. Exploitation requires a victim to open the malicious link, and the demonstrated impact is execution in that user's web session with integrity and confidentiality exposure bounded by the victim's permissions.

The record

CVE
CVE-2021-45229
Published
Feb 25, 2022
Updated
Aug 4, 2024
Vendor
The Apache Software Foundation
Product
Apache Airflow
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Airflowversion=unspecified <2.2.4

Published CVSS scores

6.1GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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