CVE-2021-27582
CVE-2021-27582 is a critical-severity vulnerability in Mitreid Connect with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- CVSS v2: 6.4
- EPSS exploit prediction: 2% (81st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1321
- Affected product: Mitreid Connect
- Published:
- Last modified:
Description
org/mitre/oauth2/web/OAuthConfirmationController.java in the OpenID Connect server implementation for MITREid Connect through 1.3.3 contains a Mass Assignment (aka Autobinding) vulnerability. This arises due to unsafe usage of the @ModelAttribute annotation during the OAuth authorization flow, in which HTTP request parameters affect an authorizationRequest.
Frequently asked questions
- What is CVE-2021-27582?
- org/mitre/oauth2/web/OAuthConfirmationController.java in the OpenID Connect server implementation for MITREid Connect through 1.3.3 contains a Mass Assignment (aka Autobinding) vulnerability. This arises due to unsafe usage of the @ModelAttribute annotation during the OAuth authorization flow, in which HTTP request parameters affect an authorizationRequest.
- How severe is CVE-2021-27582?
- CVE-2021-27582 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2021-27582 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27582?
- CVE-2021-27582 affects Mitreid Connect. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27582?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-27582 published?
- CVE-2021-27582 was published on 2021-02-23 and last updated on 2026-06-17.
References
- http://agrrrdog.blogspot.com/2017/03/autobinding-vulns-and-spring-mvc.html
- https://github.com/mitreid-connect/OpenID-Connect-Java-Spring-Server/commit/7eba3c12fed82388f917e8dd9b73e86e3a311e4c
- https://portswigger.net/research/hidden-oauth-attack-vectors
Affected products (1)
- cpe:2.3:a:mitreid:connect:*:*:*:*:*:*:*:*
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- CVE-2021-26715 — Critical (CVSS 9.1): The OpenID Connect server implementation for MITREid Connect through 1.3.3 contains a Server Side Request Forgery…
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