CVE-2021-41303

CRITICALNVD 9.89.8—Elevated

9.8

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 v3: 9.8
EG Score: 9.8(medium)
EPSS: 97.8%
KEV: Not listed

Published

September 17, 2021

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated May 27, 2026

No patch confirmed yet.

generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20220609-0001/

generic

https://lists.apache.org/thread.html/re470be1ffea44bca28ccb0e67a4cf5d744e2d2b981d00fdbbf5abc13%40%3Cannounce.shiro.apache.org%3E

generic

https://lists.apache.org/thread.html/raae98bb934e4bde304465896ea02d9798e257e486d04a42221e2c41b%40%3Cuser.shiro.apache.org%3E

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.apache.shiro:shiro-core	1.0.0-incubating ... 1.7.1 (23 versions)	1.8.0	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 7× in last 7d / 13× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 10:14 UTCEG score recompute
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-41303?

CVE-2021-41303 is a critical vulnerability published on September 17, 2021. 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.

When was CVE-2021-41303 disclosed?

CVE-2021-41303 was first published in the National Vulnerability Database on September 17, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-41303 actively exploited?

CVE-2021-41303 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-41303?

CVE-2021-41303 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-41303?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-41303, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-41303

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Is Your Infrastructure Affected by CVE-2021-41303?

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CVE-2021-41303

📅 Published

🔄 Last Modified

📋 Advisory Details (3)

NetApp Product Security

Affected Packages

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-41303?

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Advisory Details (3)

Frequently asked(5)

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