CVE-2026-77998Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO < 11.0.2, SAML SP Single Sign On – Login with ADFS < 6.4, SAML SP Single Sign On – SAML SSO login with Google Apps < 6.4
Updated under an hour ago ()
Does this affect you?
It affects miniorange.com SAML SSO Free for Joomla extension for Joomla and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
Joomla Extension - miniorange.com - Unauthenticated Authentication Bypass via SAMLResponse Parameter in miniOrange SAML SSO < 11.0.2, SAML SP Single Sign On – Login with ADFS < 6.4, SAML SP Single Sign On – SAML SSO login with Google Apps < 6.4 - This is due to the mo_saml_validate_signature() function performing a loose boolean check on the raw tri-state integer returned by PHP's openssl_verify(), causing an error return value of -1 to be evaluated as truthy and therefore treated as a successful signature verification. This makes it possible for unauthenticated attackers to log in as any existing Joomla user, including administrators, by submitting a crafted SAMLResponse containing an attacker-controlled NameID and a deliberately malformed signature value that triggers an OpenSSL processing error — bypassing verification entirely and resulting in wp_set_auth_cookie() being called for the targeted account.
- CVSS
- 10.0 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Joomla
- NVD analysis
- Deferred
- Record last updated
- Sep 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
miniorange.com SAML SSO Free for Joomla extension for Joomla miniorange.com:saml_sso_free_for_joomla_extension_for_joomla (from the name) | 1.0.0-11.0.1 | CNA record |
miniorange.com SAML SSO Basic for Joomla extension for Joomla miniorange.com:saml_sso_basic_for_joomla_extension_for_joomla (from the name) | 1.0.0-13.1.0 | CNA record |
miniorange.com SAML SSO Standard for Joomla extension for Joomla miniorange.com:saml_sso_standard_for_joomla_extension_for_joomla (from the name) | 1.0.0-24.1.0 | CNA record |
miniorange.com SAML SSO Premium for Joomla extension for Joomla miniorange.com:saml_sso_premium_for_joomla_extension_for_joomla (from the name) | 1.0.0-34.1.0 | CNA record |
miniorange.com SAML SSO Enterprise for Joomla extension for Joomla miniorange.com:saml_sso_enterprise_for_joomla_extension_for_joomla (from the name) | 1.0.0-44.1.0 | CNA record |
miniorange.com SAML SP Single Sign On – Login with ADFS extension for Joomla miniorange.com:saml_sp_single_sign_on_login_with_adfs_extension_for_joomla (from the name) | 1.0.0-6.3.0 | CNA record |
miniorange.com SAML SSO login with Google Apps extension for Joomla miniorange.com:saml_sso_login_with_google_apps_extension_for_joomla (from the name) | 1.0.0-6.3.0 | CNA record |
References
- https://www.miniorange.com/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.