CVE-2020-15943

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-08-04 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in the Gantt-Chart module before 5.5.4 for Jira. Due to a missing privilege check, it is possible to read and write to the module configuration of other users. This can also be used to deliver an XSS payload to other users' dashboards. To exploit this vulnerability, an attacker has to be authenticated.

Affected products

Gantt-Chart Project Gantt-Chart: before 5.5.4 — fixed in 5.5.4

How to fix

Upgrade to a fixed version: Gantt-Chart Project Gantt-Chart 5.5.4. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/158751/Gantt-Chart-For-Jira-5.5.3-Missing-Privilege-Check.html
http://seclists.org/fulldisclosure/2020/Aug/0
https://marketplace.atlassian.com/apps/28997/gantt-chart-for-jira?hosting=cloud&tab=overview
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-029.txt
http://packetstormsecurity.com/files/158751/Gantt-Chart-For-Jira-5.5.3-Missing-Privilege-Check.html
http://seclists.org/fulldisclosure/2020/Aug/0
https://marketplace.atlassian.com/apps/28997/gantt-chart-for-jira?hosting=cloud&tab=overview
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-029.txt

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