High severity · published Mar 16, 2020
CVE-2020-9321
configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
configurationwatcher.go in Traefik 2.x before 2.1.4 and TraefikEE 2.0.0 mishandles the purging of certificate contents from providers before logging.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TR
Traefik · Traefik
2.0.0 through 2.1.4 · source: NVD
TE
Traefik Enterprise · Traefik
2.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9321
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9321
Patch
https://github.com/containous/traefik/pull/6281
Release Notes
https://github.com/containous/traefik/releases/tag/v2.1.4
More from Traefik
10.0
CVE-2026-54763
Traefik: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth
10.0
CVE-2026-53622
Traefik: HTTP/3 mTLS bypass via exact SNI TLSOptions lookup for wildcard and mixed-case hosts
10.0
CVE-2026-48491
Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass
10.0
CVE-2026-48020
Traefik StripPrefix Route-Level Auth Bypass via Path Normalization
10.0
CVE-2026-39858
Traefik: Forwarded alias spoofing top pre-auth decision bypass