RCE in Fusionauth
CVE-2020-7799
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.
Vulnerability class: Log4Shell (CVE-2021-44228)
EPSS: 0.198 (97.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Fusionauth
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
- ianxtianxt/CVE-2020-7799
- Pikaqi/cve-2020-7799
- ARPSyndicate/cvemon
- Coldplay1517/Middleware-Vulnerability-detection-master
- SexyBeast233/SecBooks
- TrojanAZhen/Self_
- apachecn-archive/Middleware-Vulnerability-detection
- hectorgie/PoC-in-GitHub
- huimzjty/vulwiki
- lovechinacoco/https-github.com-mai-lang-chai-Middleware-Vulnerability-detection
References
- cve@mitre.org (Exploit, x_refsource_MISC, Release Notes, Vendor Advisory)
- cve@mitre.org (mailing-list, x_refsource_BUGTRAQ, Mailing List, Third Party Advisory)
- cve@mitre.org (VDB Entry, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-7799?
- CVE-2020-7799 is a high-severity vulnerability in Fusionauth, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 7.2/10. Published 2020-01-28.
- How severe is CVE-2020-7799?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2020-7799 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.