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Fencer Vulns
critical 9.8

CVE-2020-17510 json

Authentication bypass in Apache Shiro

published 2020-11-05 6 y ago modified 2026-06-17 4 mo ago also GHSA-7cj4-gj8m-m2f7 , EUVD-2021-0788

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.0%
EPSS 8.0% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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

Patch / fix

  • maven org.apache.shiro:shiro-spring 1.7.0
  • apache shiro 1.7.0
  • shiro Debian 14, Debian 13, Debian 12 1.3.2-5

debian advisories DEBIAN-CVE-2020-17510

  • shiro Ubuntu 20.04 LTS 1.3.2-4ubuntu0.2
  • shiro Ubuntu 22.04 LTS 1.3.2-5
  • shiro Ubuntu Pro 18.04 LTS 1.3.2-3ubuntu0.18.04.1~esm1

ubuntu advisories UBUNTU-CVE-2020-17510

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-17510 updated cvss 9.8

shiro: specially crafted HTTP request may cause an authentication bypass

  • Red Hat JBoss A-MQ 6 shiro shiro Red Hat JBoss Fuse 6 shiro-core shiro-core Red Hat OpenStack Platform 10 (Newton) opendaylight
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 13 (Queens) opendaylight
    affected: no fix planned “Will not fix”
  • Red Hat Fuse 7.9
    fixed: vendor fix RHSA-2021:3140
  • Red Hat Integration Camel K 1 camel-shiro camel-shiro Red Hat JBoss Fuse Service Works 6 shiro-core shiro-core
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.03% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
maven org.apache.shiro:shiro-spring
<1.7.0
1.7.0

Affected products

  • n/a Apache Shiro

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.