CVE-2021-43945Network attack vector

Stored script execution via unsanitized issueTypes parameter

Published Feb 28, 2022 · Updated Oct 4, 2024

Stored XSS in Atlassian Jira Server and Data Center before 8.20.3 allows remote authenticated users to inject JavaScript through issueTypes. The /rest/jpo/1.0/hierarchyConfiguration endpoint stores arbitrary HTML or JavaScript from the issueTypes parameter without neutralizing it for later rendering. Roadmaps Administrator permission is required, and a later viewer executes the stored script in the user's Jira browser context.

CVSS severity4.8
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in Atlassian Jira Server and Data Center before 8.20.3 allows remote authenticated users to inject JavaScript through issueTypes. The /rest/jpo/1.0/hierarchyConfiguration endpoint stores arbitrary HTML or JavaScript from the issueTypes parameter without neutralizing it for later rendering. Roadmaps Administrator permission is required, and a later viewer executes the stored script in the user's Jira browser context.

The record

CVE
CVE-2021-43945
Published
Feb 28, 2022
Updated
Oct 4, 2024
Vendor
Atlassian
Product
Jira Server
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <8.20.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Atlassian · Jira Serverversion=unspecified <8.20.3
Atlassian · Jira Data Centerversion=unspecified <8.20.3

Published CVSS scores

4.8National Vulnerability Database via GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo