CVE-2020-17523

highpriority · attend · 79EPSS 0.859 · 100 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

85.9% (100th) EPSS

CVSS 9 · high

Is it mine?

6 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9–9.8

v2.09highAV:N/AC:L/Au:N/C:P/I:P/A:Cprimary · NVD / NIST USexploitability 10 · impact 8.5

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-287USCWE-287US

exploits (1)

Public proof-of-concept and weaponised exploit code.

jweny/shiro-cve-2020-17523shiro-cve-2020-17523 漏洞的两种绕过姿势分析以及配套的漏洞环境PoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

n/a Apache Shiro≤ before 1.7.1enisa_euvdEU
Apache Software Foundation Shiro≤ 1.7.1fstec_bduRU
apache shiro< 1.7.1nvdUScpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*
Maven org.apache.shiro:shiro-spring< 1.7.1osvUSpkg:maven/org.apache.shiro/shiro-spring
Maven org.apache.shiro:shiro-spring-boot-starter< 1.7.1osvUSpkg:maven/org.apache.shiro/shiro-spring-boot-starter
Maven org.apache.shiro:shiro-web< 1.7.1osvUSpkg:maven/org.apache.shiro/shiro-web

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-v98j-7crc-wvrjAuthentication bypass in Apache Shiro2022-02-09ghsa · osvUS
Apache Shiro before 1.7.1, when using Apache Shiro with Spring, a specially crafted HTTP request may cause an authentication bypass.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2021-02-03modified 2026-06-17

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+7709 more

references (25)

External citations — patches, advisories, analysis.

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