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CVE-2020-11989

42
FAUCET Score

CVE-2020-11989 is a critical authentication bypass vulnerability affecting Apache Shiro versions prior to 1.5.3, specifically when integrated with Spring dynamic controllers. This flaw allows an unauthenticated attacker to craft a special request, bypassing authentication mechanisms. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk with high impact on confidentiality, integrity, and availability, requiring no user interaction or privileges. While there are no known active exploits in the wild, nor public exploit code on platforms like Metasploit or ExploitDB, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.5.3CPE matchmatch criteria
cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
24.44%
Probability of exploitation in next 30 days
EPSS Percentile
97.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.2444 is in the 94th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mavenpatch availablevia ghsa
Product: org.apache.shiro:shiro-coreFixed in: 1.5.3
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.8.0Fixed in: shiro-core
View patch
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: opendaylight

Vendor Advisories (2)

mavenGHSA-72w9-fcj5-3fcgcritical

Improper Authentication in Apache Shiro

May 7, 2021
redhatCVE-2020-11989Important

shiro: spring dynamic controllers, a specially crafted request may cause an authentication bypass

Jun 22, 2020

References

lists.apache.org / thread.html/r2d2612c034ab21a3a19d2132d47d3e4aa70105008dd58af62b653040%40%3Ccommits.shiro.apache.org%3E
lists.apache.org / thread.html/r408fe60bc8fdfd7c74135249d646d7abadb807ebf90f6fd2b014df21%40%3Cdev.geode.apache.org%3E
lists.apache.org / thread.html/r72815a124a119c450b86189767d06848e0d380b1795c6c511d54a675%40%3Cdev.shiro.apache.org%3E
lists.apache.org / thread.html/r72815a124a119c450b86189767d06848e0d380b1795c6c511d54a675%40%3Cuser.shiro.apache.org%3E
Mailing ListVendor Advisory
lists.apache.org / thread.html/rab1972d6b177f7b5c3dde9cfb0a40f03bca75f0eaf1d8311e5762cb3%40%3Ccommits.shiro.apache.org%3E
lists.apache.org / thread.html/rc8b39ea8b3ef71ddc1cd74ffc866546182683c8adecf19c263fe7ac0%40%3Ccommits.shiro.apache.org%3E
lists.apache.org / thread.html/rcf3d8041e1232201fe5d74fc612a193e435784d64002409b448b58fe%40%3Cdev.geode.apache.org%3E