Skip to content
Fencer Vulns
medium 5.4

CVE-2020-22790 json

Authenticated Stored XSS in FME Server versions 2019.2 and 2020.0 Beta allows a remote attacker to execute codeby injecting arbitrary web s…

published 2021-04-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-15547

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 70%
public exploits
0
none known

Summary

Authenticated Stored XSS in FME Server versions 2019.2 and 2020.0 Beta allows a remote attacker to execute codeby injecting arbitrary web script or HTML via modifying the name of the users. The XSS is executed when an administrator access the logs.

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • mexicanpentester.com https://mexicanpentester.com/2020/04/09/vulnerabilities-in-fme-server-versions-2019-2-and-2020-0-beta-and-probably-previous-versions/ 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.