How severe is CVE-2020-15943?

CVE-2020-15943 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-15943 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15943?

CVE-2020-15943 affects Gantt-chart Project Gantt-chart. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15943?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-15943 published?

CVE-2020-15943 was published on 2020-08-04 and last updated on 2026-06-17.

CVE-2020-15943

CVE-2020-15943 is a high-severity vulnerability in Gantt-chart Project Gantt-chart with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Gantt-chart Project Gantt-chart
Published: 2020-08-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-15943?: 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.
How severe is CVE-2020-15943?: CVE-2020-15943 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-15943 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15943?: CVE-2020-15943 affects Gantt-chart Project Gantt-chart. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15943?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-15943 published?: CVE-2020-15943 was published on 2020-08-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gantt-chart_project:gantt-chart:*:*:*:*:*:jira:*:*

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