Jenkins SAML Single Sign On(SSO) Plugin missing hostname validation

published 2023-05-16 3 y ago modified 2026-06-17 4 mo ago also GHSA-6v6h-rw43-97fh , EUVD-2023-1488

cvss: 4.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits: 0; none known

Jenkins SAML Single Sign On(SSO) Plugin 2.0.2 and earlier does not perform hostname validation when connecting to miniOrange or the configured IdP to retrieve SAML metadata, which could be abused using a man-in-the-middle attack to intercept these connections.

Patch / fix

fixed in 1

maven io.jenkins.plugins:miniorange-saml-sp 2.1.0

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-23)

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
GitHub	3.1	4.8	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	io.jenkins.plugins:miniorange-saml-sp	<2.1.0	2.1.0

Affected products

Jenkins Project Jenkins SAML Single Sign On(SSO) Plugin

Classification

Weakness

CWE-346 Origin Validation Error
CWE-345 Insufficient Verification of Data Authenticity

References

jenkins.io /security/advisory/2023-05-16/#SECURITY-3001%20(1)
vendor-advisory, web
nvd.nist.gov /vuln/detail/CVE-2023-32993
advisory

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.

Summary