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Fencer Vulns
medium 5.4

CVE-2020-15944 json

An issue was discovered in the Gantt-Chart module before 5.5.5 for Jira.

published 2020-08-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-7915

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

An issue was discovered in the Gantt-Chart module before 5.5.5 for Jira. Due to missing validation of user input, it is vulnerable to a persistent XSS attack. An attacker can embed the attack vectors in the dashboard of other users. To exploit this vulnerability, an attacker has to be authenticated.

Patch / fix

  • gantt-chart_project gantt-chart 5.5.5

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • syss.de https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2020-030.txt referenced PoC, tagged "exploit" by a source, unverified
  • seclists.org http://seclists.org/fulldisclosure/2020/Aug/1 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/158752/Gantt-Chart-For-Jira-5.5.4-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.