CVE-2020-15943: An issue was discovered in the Gantt-Chart module before 5.5.4 for Jira

Q: How do I fix CVE-2020-15943?

gantt-chart: upgrade to 5.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2020-15943 being exploited?

CVE-2020-15943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-15943 affect?

CVE-2020-15943 affects gantt-chart. Severity is high (CVSS 8.1). 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

Q: How urgent is CVE-2020-15943?

Priority 54/100. High severity; Public exploit reference

This month

HIGH 8.1UPGRADE

CVE-2020-15943 is a high-severity flaw (CVSS 8.1) affecting gantt-chart. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-79, CWE-862
Published	2020-08-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gantt-chart project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-08-04 20:15 UTCPublished CVE record published
2026-06-17 02:57 UTCUpdated Record last modified

gantt-chart project gantt-chart UPGRADE

Affected: < 5.5.4

Fixed in: 5.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gantt-chart || rpm -q gantt-chart || gantt-chart --version

2. UPGRADE to 5.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gantt-chart

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gantt-chart

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-15943?

gantt-chart: upgrade to 5.5.4. Exact commands for each OS are on this page.

Is CVE-2020-15943 being exploited?

CVE-2020-15943 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-15943 affect?

CVE-2020-15943 affects gantt-chart. Severity is high (CVSS 8.1). 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

How urgent is CVE-2020-15943?

Priority 54/100. High severity; Public exploit reference

Software pages

Atlassian Jira vulnerabilities

Related CVEs

CVE-2020-15944 MEDIUM 5.4 UPGRADE An issue was discovered in the Gantt-Chart module before 5.5.5 for Jira

References

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