CVE-2020-15943

Name: CVE-2020-15943
Creator: NVD / NIST
Published: 2020-08-04T20:15:12.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.83%

Last modified Jun 17, 2026

CVE-2020-15943 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

1.83%

76.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gantt-Chart Project	Gantt-Chart	< 5.5.4

References

http://packetstormsecurity.com/files/158751/Gantt-Chart-For-Jira-5.5.3-Missing-Privilege-Check.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Aug/0Exploit, Mailing List, Third Party Advisory
https://marketplace.atlassian.com/apps/28997/gantt-chart-for-jira?hosting=cloud&tab=overviewProduct, Third Party Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-029.txtExploit, Third Party Advisory
http://packetstormsecurity.com/files/158751/Gantt-Chart-For-Jira-5.5.3-Missing-Privilege-Check.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Aug/0Exploit, Mailing List, Third Party Advisory
https://marketplace.atlassian.com/apps/28997/gantt-chart-for-jira?hosting=cloud&tab=overviewProduct, Third Party Advisory
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-029.txtExploit, Third Party Advisory

Timeline

Published: Aug 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15943?

How severe is CVE-2020-15943?

CVE-2020-15943 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15943?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15943?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST