CVE-2026-61979Known exploitationNetwork attack vector

Unauthenticated privilege escalation via HMAC algorithm confusion

Published Aug 13, 2026 · Updated Aug 13, 2026

Signature algorithm confusion in miniOrange SAML SP Single Sign On – Login with ADFS 5.4.3 and earlier allows remote attackers to forge assertions. The SAML validation path accepts the response's HMAC-SHA1 choice and feeds the identity provider's public RSA key to hash_hmac as a shared secret. A configured identity provider makes that key obtainable; account and role mappings determine which existing WordPress user's privileges the forged assertion grants.

CVSS severity8.1
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Signature algorithm confusion in miniOrange SAML SP Single Sign On – Login with ADFS 5.4.3 and earlier allows remote attackers to forge assertions. The SAML validation path accepts the response's HMAC-SHA1 choice and feeds the identity provider's public RSA key to hash_hmac as a shared secret. A configured identity provider makes that key obtainable; account and role mappings determine which existing WordPress user's privileges the forged assertion grants.

The record

CVE
CVE-2026-61979
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
miniOrange
Product
SAML SP Single Sign On – Login with ADFS
Classifications
CWE-266, CAPEC-233, T1606.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.
  3. Aug 16, 2026Exploitation reportedAttempted exploitation against miniOrange SAML SSO endpoints

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=5.4.3 changes=[{"at":"5.4.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

miniOrange · SAML SP Single Sign On – Login with ADFSversion=n/a <=5.4.3 changes=[{"at":"5.4.4","status":"unaffected"}]

Published CVSS scores

8.1PatchstackCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CAPEC-233Privilege Escalation
T1606.002Forge Web Credentials: SAML Tokens

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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