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CVE-2021-41303

73
FAUCET Score

CVE-2021-41303 describes a critical authentication bypass vulnerability in Apache Shiro versions prior to 1.8.0, specifically when integrated with Spring Boot, affecting Apache and Oracle financial services products. This flaw allows an unauthenticated attacker to craft a malicious HTTP request, bypassing security controls. With a CVSS score of 9.8 (CRITICAL), the vulnerability is easily exploitable over the network with no user interaction, leading to high impacts on confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion and media coverage, indicating awareness.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.8.0CPE matchmatch criteria
cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*
8.0.8.2.0CPE matchmatch criteria
cpe:2.3:a:oracle:financial_services_crime_and_compliance_management_studio:8.0.8.2.0:*:*:*:*:*:*:*
8.0.8.3.0CPE matchmatch criteria
cpe:2.3:a:oracle:financial_services_crime_and_compliance_management_studio:8.0.8.3.0:*:*:*:*:*:*:*

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
76.66%
Probability of exploitation in next 30 days
EPSS Percentile
99.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.7666 is in the 98th percentile among its peer group of 36,862 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

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: 1.8.0
oraclepatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Fuse 7Fixed in: shiro-web

Vendor Advisories (2)

mavenGHSA-f6jp-j6w3-w9hmcritical

Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass

Sep 20, 2021
redhatCVE-2021-41303Important

shiro: specially crafted HTTP request may cause an authentication bypass

Sep 16, 2021

References

lists.apache.org / thread.html/raae98bb934e4bde304465896ea02d9798e257e486d04a42221e2c41b%40%3Cuser.shiro.apache.org%3E
lists.apache.org / thread.html/re470be1ffea44bca28ccb0e67a4cf5d744e2d2b981d00fdbbf5abc13%40%3Cannounce.shiro.apache.org%3E
Mailing ListVendor Advisory
security.netapp.com / advisory/ntap-20220609-0001
Third Party Advisory
oracle.com / security-alerts/cpujul2022.html
PatchThird Party Advisory