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SAML Single Sign On – SSO Login <= 6.1.0 — Unauthenticated Denial of Service

CVE-2026-62126Published · Updated

Action summary

Affected: ≤6.1.0Update to 6.2.0 or newer

All remediation steps
Watch plugin
Severity
High7.5
CVSS
7.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:N Integrity
None
A:H Availability
High
Weakness
CWE-400 Uncontrolled Resource Consumption
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

SAML Single Sign On – SSO Login miniorange-saml-20-single-sign-on

  1. Affected≤ 6.1.0
  2. Patched in6.2.0

Update to 6.2.0 or newer.

You are affected if you run ≤ 6.1.0. Version 6.2.0 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under SAML Single Sign On – SSO Login.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 6.2.0, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch SAML Single Sign On – SSO Login to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Jens Friess.

The SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to Denial of Service in all versions up to, and including, 6.1.0. This is due to insufficient validation of user supplied input. This makes it possible for unauthenticated attackers to make the affected site unavailable.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in SAML Single Sign On – SSO Login

All 13
More vulnerabilities in SAML Single Sign On – SSO Login
SeverityVulnerabilityCVEPublished
High7.3Unauthenticated Privilege Escalation
≤5.4.7Update to 6.0.0
CVE-2026-82842
High7.5Unauthenticated Authentication Bypass via X.509 Certificate Poisoning
≤5.4.6Update to 5.4.7
CVE-2026-75807
High7.3Unauthenticated Privilege Escalation
4.8.85 – 5.4.6Update to 5.4.7
CVE-2026-19842
Critical9.8Unauthenticated Privilege Escalation
≤5.4.3Update to 5.4.4
CVE-2026-61979
Critical9.8Unauthenticated Authentication Bypass via SAMLResponse Parameter
≤5.4.4Update to 5.4.5
CVE-2026-15981

Timeline

  1. CVE published

    Severity high, CVSS 7.5

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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