CVE-2021-41303
Apache Shiro before 1.8.0, when using Apache Shiro with Spring Boot, a specially crafted HTTP request may cause an authentication bypass
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-41303- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE List No score
Apache Shiro before 1.8.0, when using Apache Shiro with Spring Boot, a specially crafted HTTP request may cause an authentication bypass
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.
- Record
CVE-2021-41303- Weakness
- CWE-287
- Updated
- 2026-11-02
EUVDEUVD-2021-2049 No score
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.
- Record
EUVD-2021-2049- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f6jp-j6w3-w9hm
Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass
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.
- Record
GHSA-f6jp-j6w3-w9hm- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-41303- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-41303
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.
- Record
DEBIAN-CVE-2021-41303- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-f6jp-j6w3-w9hm
Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass
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.
- Record
GHSA-f6jp-j6w3-w9hm- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.apache.shiro:shiro-coreMaven |
before 1.8.0 | 1.8.0 |
shiroDebian:12 |
All versions, plus listed versions 1.3.2-51.3.2-6 |
None known |
shiroDebian:13 |
All versions, plus listed versions 1.3.2-6 |
None known |
shiroDebian:14 |
All versions, plus listed versions 1.3.2-6 |
None known |
org.apache.shiro:shiro-coreMaven |
before 1.8.0, plus listed versions 1.0.0-incubating1.1.01.2.01.2.11.2.2 Show 18 moreShow less1.2.31.2.41.2.51.2.61.3.01.3.11.3.21.4.01.4.0-RC21.4.11.4.21.5.01.5.11.5.21.5.31.6.01.7.01.7.1 |
1.8.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-41303 is a critical vulnerability (CVSS 9.8) in Apache Shiro, published September 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 76.1%, the 99th percentile. Fixed in org.apache.shiro:shiro-core 1.8.0.
References
lists.apache.org/thread.html/re470be1ffea44bca28ccb0e67a4cf5d744e2d2b981d00fdbbf5abc13%40%3Cannounce.shiro.apache.org%3E
oracle.com/security-alerts/cpujul2022.html
security.netapp.com/advisory/ntap-20220609-0001
nvd.nist.gov/vuln/detail/CVE-2021-41303
github.com/advisories/GHSA-f6jp-j6w3-w9hm
security-tracker.debian.org/tracker/CVE-2021-41303