6.9
MEDIUM
CVE-2025-27370
OpenID Connect Core through errata set 2 Audience Injection Vulnerability
Description

OpenID Connect Core through 1.0 errata set 2 allows audience injection in certain situations. When the private_key_jwt authentication mechanism is used, a malicious Authorization Server could trick a Client into writing attacker-controlled values into the audience, including token endpoints or issuer identifiers of other Authorization Servers. The malicious Authorization Server could then use these private key JWTs to impersonate the Client.

INFO

Published Date :

March 3, 2025, 6:15 p.m.

Last Modified :

March 7, 2025, 5:15 p.m.

Remotely Exploitable :

Yes !

Impact Score :

4.7

Exploitability Score :

1.6
Affected Products

The following products are affected by CVE-2025-27370 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-27370 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-27370 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    Mar. 07, 2025

    Action Type Old Value New Value
    Added Reference https://github.com/OWASP/ASVS/issues/2678
  • CVE Modified by [email protected]

    Mar. 03, 2025

    Action Type Old Value New Value
    Added CWE CWE-305
    Removed CWE CWE-863
  • New CVE Received by [email protected]

    Mar. 03, 2025

    Action Type Old Value New Value
    Added Description OpenID Connect Core through 1.0 errata set 2 allows audience injection in certain situations. When the private_key_jwt authentication mechanism is used, a malicious Authorization Server could trick a Client into writing attacker-controlled values into the audience, including token endpoints or issuer identifiers of other Authorization Servers. The malicious Authorization Server could then use these private key JWTs to impersonate the Client.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N
    Added CWE CWE-863
    Added Reference https://openid.net/notice-of-a-security-vulnerability/
    Added Reference https://openid.net/wp-content/uploads/2025/01/OIDF-Responsible-Disclosure-Notice-on-Security-Vulnerability-for-private_key_jwt.pdf
    Added Reference https://talks.secworkshop.events/osw2025/talk/R8D9BS/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-27370 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-27370 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability