CVE-2021-43942

MEDIUM

Atlassian Jira Server/Data Center <8.13.15 & <8.14.0-8.20.3 - XSS

Title source: llm

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to inject arbitrary HTML or JavaScript via a Reflected Cross-Site Scripting (XSS) vulnerability in the /rest/collectors/1.0/template/custom endpoint. To exploit this issue, the attacker must trick a user into visiting a malicious website. The affected versions are before version 8.13.15, and from version 8.14.0 before 8.20.3.

References (1)

Core 1

Core References

Issue Tracking, Vendor Advisory x_refsource_misc

https://jira.atlassian.com/browse/JRASERVER-73068

Scores

CVSS v3 6.1

EPSS 0.0046

EPSS Percentile 64.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

atlassian/jira_server 8.14.0 - 8.20.3

atlassian/jira_server_and_data_center < 8.13.5

Published Jan 04, 2022

Tracked Since Feb 18, 2026