CVE-2020-17510

Authentication bypass in Apache Shiro

9.8 CriticalFix available

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

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

8.03%Up 2.6 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: CVE-2020-17510
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV: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 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: CVE-2020-17510
Updated: 2026-11-02

EUVDEUVD-2021-0788 No score

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: EUVD-2021-0788
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7cj4-gj8m-m2f7 9.8

Authentication bypass in Apache Shiro

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: GHSA-7cj4-gj8m-m2f7
CVSS 3.1: 9.8 CriticalCVSS: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 9.8

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: CVE-2020-17510
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-17510 9.8

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: DEBIAN-CVE-2020-17510
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-7cj4-gj8m-m2f7 9.8

Authentication bypass in Apache Shiro

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: GHSA-7cj4-gj8m-m2f7
CVSS 3.1: 9.8 CriticalCVSS: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

OSVUBUNTU-CVE-2020-17510 9.8

Apache Shiro before 1.7.0, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

Record: UBUNTU-CVE-2020-17510
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUSN-6352-1 No score

shiro vulnerabilities

It was discovered that Apache Shiro incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to bypass security restrictions. (CVE-2020-13933, CVE-2020-17510)

Record: USN-6352-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.shiro:shiro-spring` Maven	before 1.7.0	1.7.0
`shiro` Debian:12	before 1.3.2-5	1.3.2-5
`shiro` Debian:13	before 1.3.2-5	1.3.2-5
`shiro` Debian:14	before 1.3.2-5	1.3.2-5
`shiro` Debian:9	before 1.3.2-1+deb9u2, plus listed versions 1.3.2-11.3.2-1+deb9u1	1.3.2-1+deb9u2
`org.apache.shiro:shiro-spring` Maven	before 1.7.0, plus listed versions 1.0.0-incubating1.1.01.2.01.2.11.2.2 Show 16 moreShow less 1.2.31.2.41.2.51.2.61.3.01.3.11.3.21.4.01.4.0-RC21.4.11.4.21.5.01.5.11.5.21.5.31.6.0	1.7.0
`shiro` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.2.4-11.2.4-1ubuntu0.1~esm11.2.4-1ubuntu0.1~esm2	None known
`shiro` Ubuntu:Pro:18.04:LTS	before 1.3.2-3ubuntu0.18.04.1~esm1, plus listed versions 1.3.2-21.3.2-3~18.041.3.2-3~18.04.1	1.3.2-3ubuntu0.18.04.1~esm1
`shiro` Ubuntu:20.04:LTS	before 1.3.2-4ubuntu0.2, plus listed versions 1.3.2-41.3.2-4ubuntu0.1	1.3.2-4ubuntu0.2
`shiro` Ubuntu:22.04:LTS	before 1.3.2-5, plus listed versions 1.3.2-4	1.3.2-5

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-17510 is a critical vulnerability (CVSS 9.8) in Apache Shiro, published November 5, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.03%, the 94th percentile. Fixed in org.apache.shiro:shiro-spring 1.7.0.

References

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