CVE-2020-7799 in the critical feed json
An issue was discovered in FusionAuth before 1.11.0.
published 2020-01-28 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-28731
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 19.8%
- EPSS 19.8% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.
Patch / fix
- fusionauth fusionauth 1.11.0
Exploit prediction
19.81% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- fusionauth.io https://fusionauth.io/docs/v1/tech/release-notes referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement
References
-
fusionauth.io
/docs/v1/tech/release-notes
exploit, release-notes, vendor-advisory
-
seclists.org
/bugtraq/2020/Jan/39
mailing-list, third-party-advisory
-
packetstormsecurity.com
/files/156102/FusionAuth-1.10-Remote-Command-Execution.html
third-party-advisory, vdb-entry
-
lab.mediaservice.net
/advisory/2020-03-fusionauth.txt
third-party-advisory
Sources
- CVE List CVE-2020-7799
- NVD CVE-2020-7799
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.