High severity · published Jul 21, 2020
CVE-2020-15879
Bitwarden Server 1.35.1 allows SSRF because it does not consider certain IPv6 addresses (ones beginning with fc, fd, fe, or ff, and the :: address) and certain IPv4 addresses…
7.5
CVSS
2.7%
EPSS
No
On KEV
Description
Bitwarden Server 1.35.1 allows SSRF because it does not consider certain IPv6 addresses (ones beginning with fc, fd, fe, or ff, and the :: address) and certain IPv4 addresses (0.0.0.0/8, 127.0.0.0/8, and 169.254.0.0/16).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.7% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Server · Bitwarden
1.35.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15879
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15879
Third Party Advisory
https://github.com/bitwarden/server/pull/827
More from Server
9.1
CVE-2026-43639
Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients
8.1
CVE-2026-43640
Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
8.0
CVE-2026-60104
Bitwarden Server < 2026.6.0 Authorization Bypass via Admin Auth Request
7.5
CVE-2019-19766
The Bitwarden server through 1.32.0 has a potentially unwanted KDF
7.1
CVE-2026-57520
Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint
