CVE-2021-41303: apache software foundation apache shiro Improper Authentication
CVSS: 9.8v3.1CriticalModified
AliasesDEBIAN-CVE-2021-41303GHSA-f6jp-j6w3-w9hm
Published 17-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-41303 is a critical (CVSS 9.8) Improper Authentication vulnerability in apache software foundation apache shiro. EPSS estimates a 76.13% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
76.13%
0%100%
Critical · -0.53 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 17-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Apache Shiro before 1.8.0, when using Apache Shiro with Spring Boot, a specially crafted HTTP request may cause an authentication bypass. Users should update to Apache Shiro 1.8.0.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · MavenEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
76.13%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
-0.53 pp
From 76.66% on 18-09-2026
18-09-202618-10-2026
EPSS score76.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apache1 product
- shiro< 1.8.0
Apache software foundation1 product
- apache shiro≥ Apache Shiro, < 1.8.0
Debian1 product
- shiroAll versions (No fix recorded)
Oracle1 product
- financial_services_crime_and_compliance_management_studio8.0.8.2.0 | 8.0.8.3.0
Org.apache.shiro1 product
- shiro-core< 1.8.0
5 vendors · 5 products
