Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
☕
☕ Maven
Not in CISA KEV
CRITICAL severity

CVE-2021-27582 — openid-connect-parent

CRITICALFix: mitreid-connect/OpenID-Connect-Java-Spring-Server@7eba3c1

CVE-2021-27582 is a critical-severity (CVSS 9.1) CWE-1321 vulnerability in org.mitre:openid-connect-parent. 2 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Autobinding vulnerability in MITREid Connect

Also known asGHSA-8p36-q63g-68qh
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
2 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
2.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs82th percentile — riskier than 82% of all scored CVEsHighest risk
0.12%0.98%1.85%2.72%0.6%2.2%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-27582 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
☕org.mitre:openid-connect-parent

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
☕Mavenorg.mitre:openid-connect-parentall versionsNo fix

Affected Products

1 product · 1 configurations
Application
connectmitreid
≤ 1.3.3
range
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

org/mitre/oauth2/web/OAuthConfirmationController.java in the OpenID Conn…

agrrrdog.blogspot.comNVDMar 2021

org/mitre/oauth2/web/OAuthConfirmationController.java in the OpenID Conn…

portswigger.netNVDApr 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.mitre:openid-connect-parent, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    No patched version of org.mitre:openid-connect-parent has shipped for CVE-2021-27582 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

Is CVE-2021-27582 in your dependencies?

Find it across Maven, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2021-27582: openid-connect-parent (Critical 9.1)