Prototype Pollution in Mitreid Connect
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.
Vulnerability class: Prototype Pollution
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.022 (82.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mitreid-connect/OpenID-Connect-Java-Spring-Server/commit/7eba3c12fed… (Patch, Third Party Advisory)
- agrrrdog.blogspot.com/2017/03/autobinding-vulns-and-spring-mvc.html (Exploit, Third Party Advisory)
- portswigger.net/research/hidden-oauth-attack-vectors (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27582?
- CVE-2021-27582 is a critical-severity vulnerability in Mitreid Connect, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.1/10. Published 2021-02-23.
- How severe is CVE-2021-27582?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-27582 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.