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CVE-2021-41303 Apache Shiro

Affected softwareApache Shiro
Severity9.8 Critical CVSS 3.1 2 scores
Fixed in1.8.0
WeaknessImproper authentication (CWE-287)
Published17 Sep 2021
Updated17 Jun 2026

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.

Exploitation status

Forecast only (76% 30-day chance)

No exploit has been reported in the sources we check. EPSS puts this CVE in the top 0.46% of all scored CVEs. That is a model's forecast, not a report of exploitation.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 76% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99.5% of all scored CVEs.

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
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 NVD Primary published
CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update July 2022 ↗ CPU 2022-Q3 Oracle Financial Services Applications / Studio (Apache Shiro) (8.0.8.2.0, 8.0.8.3.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Financial Services Applications Studio (Apache Shiro) 8.0.8.2.0, 8.0.8.3.0 8.0.8.2.0 · 8.0.8.3.0

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.apache.shiro:shiro-core 0 1.8.0 unbounded

Products and versions

3 products, 4 version entries
SourceVendorProductSchemeAffected versions
nvd apache shiro generic < 1.8.0
nvd oracle financial services crime and compliance management studio generic 8.0.8.2.0 · 8.0.8.3.0
osv org.apache.shiro shiro-core generic < 1.8.0

References

URLTags
https://lists.apache.org/thread.html/raae98bb934e4bde304465896ea02d9798e257e486d04a42221e2c41b@%3Cuser.shiro.apache.org%3E WEB
https://lists.apache.org/thread.html/re470be1ffea44bca28ccb0e67a4cf5d744e2d2b981d00fdbbf5abc13%40%3Cannounce.shiro.apache.org%3E WEB
https://security.netapp.com/advisory/ntap-20220609-0001 WEB
https://www.oracle.com/security-alerts/cpujul2022.html WEB
https://lists.apache.org/thread.html/raae98bb934e4bde304465896ea02d9798e257e486d04a42221e2c41b%40%3Cuser.shiro.apache.org%3E
https://security.netapp.com/advisory/ntap-20220609-0001/ Third Party Advisory

Timeline

Published2021-09-17By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.