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Vulnerability record · CVE-2018-20824 · published 3 May 2019

CVE-2018-20824: Atlassian jira cross-site scripting vulnerability

Atlassian · Jira

The WallboardServlet resource in Jira before version 7.13.1 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the cyclePeriod parameter.

6.1 CVSS 3.0 Medium EPSS 38% · top 1.5% CWE-79 · Cross-site scripting
6.1CVSS 3.0 base score, v2 4.3
38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

The WallboardServlet resource in Jira before version 7.13.1 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the cyclePeriod parameter.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://jira.atlassian.com/browse/JRASERVER-69238 Issue TrackingVendor Advisory
https://jira.atlassian.com/browse/JRASERVER-69238 Issue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-20824), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.