CVE-2020-13933

HIGHNVD 7.57.5—Elevated

7.5

Apache Shiro before 1.6.0, when using Apache Shiro, a specially crafted HTTP request may cause an authentication bypass.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 99.2%
KEV: Not listed

Published

August 17, 2020

Last Modified

November 21, 2024

References (32)

Vendor Advisories for CVE-2020-13933(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

RHSA-2020:5568
Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Fuse 7.8.0 release and security update

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libshiro-java (1.3.2-4ubuntu0.2) @ focal	2026-05-27	ubuntu
redhat	shiro-core	2021-02-02	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.apache.shiro:shiro-core	1.0.0-incubating ... 1.5.3 (20 versions)	1.6.0	—

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 10× 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
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-27 00:05 UTCEG score recompute
2026-05-27 00:05 UTCVendor advisory
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoC0xkami/cve-2020-13933
First seen Sep 23, 2020
cve-2020-13933 apache shiro权限绕过漏洞
Open source ↗
GitHub PoCEXP-Docs/CVE-2020-13933
First seen Sep 9, 2020
CVE-2020-13933 靶场： shiro 认证绕过漏洞
Open source ↗

Frequently asked(5)

What is CVE-2020-13933?

CVE-2020-13933 is a high vulnerability published on August 17, 2020. Apache Shiro before 1.6.0, when using Apache Shiro, a specially crafted HTTP request may cause an authentication bypass.

When was CVE-2020-13933 disclosed?

CVE-2020-13933 was first published in the National Vulnerability Database on August 17, 2020, 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-2020-13933 actively exploited?

CVE-2020-13933 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-13933?

CVE-2020-13933 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2020-13933?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-13933, 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-2020-13933

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CVE-2020-13933

📅 Published

🔄 Last Modified

🔗 References (32)

📣 Vendor Advisories for CVE-2020-13933(1)