CVE-2019-12422

Improper input validation in Apache Shiro

7.5 HighPublic exploitFix available

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

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: None
Integrity: High
Availability: None

Exploit likelihood

9.10%Up 7.2 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: CVE-2019-12422
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Updated: 2026-11-02

CVE List No score

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: CVE-2019-12422
Updated: 2026-11-02

EUVDEUVD-2020-0313 No score

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: EUVD-2020-0313
Updated: 2026-11-03

GitHub AdvisoriesGHSA-r679-m633-g7wc 7.5

Improper input validation in Apache Shiro

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: GHSA-r679-m633-g7wc
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSV 7.5

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: CVE-2019-12422
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-12422 7.5

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: DEBIAN-CVE-2019-12422
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGHSA-r679-m633-g7wc 7.5

Improper input validation in Apache Shiro

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: GHSA-r679-m633-g7wc
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-12422 7.5

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

Record: UBUNTU-CVE-2019-12422
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

Affected products

apache shiro

Affected packages

Affected packages
Package	Affected	Fixed
`org.apache.shiro:shiro-core` Maven	before 1.4.2	1.4.2
`shiro` Debian:12	All versions, plus listed versions 1.3.2-51.3.2-6	None known
`shiro` Debian:13	All versions, plus listed versions 1.3.2-6	None known
`shiro` Debian:14	All versions, plus listed versions 1.3.2-6	None known
`org.apache.shiro:shiro-core` Maven	before 1.4.2, plus listed versions 1.0.0-incubating1.1.01.2.01.2.11.2.2 Show 10 moreShow less 1.2.31.2.41.2.51.2.61.3.01.3.11.3.21.4.01.4.0-RC21.4.1	1.4.2
`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	All versions, plus listed versions 1.3.2-21.3.2-3~18.041.3.2-3~18.04.11.3.2-3ubuntu0.18.04.1~esm1	None known
`shiro` Ubuntu:20.04:LTS	All versions, plus listed versions 1.3.2-41.3.2-4ubuntu0.11.3.2-4ubuntu0.2	None known
`shiro` Ubuntu:22.04:LTS	All versions, plus listed versions 1.3.2-41.3.2-5	None known
`shiro` Ubuntu:24.04:LTS	All versions, plus listed versions 1.3.2-5	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	BaiHLiu/RuoYI-4.2-Shiro-721-Docker-PoC	2024-11-08

History

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

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

In short

CVE-2019-12422 is a high vulnerability (CVSS 7.5) in Apache Shiro, published November 18, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.10%, the 95th percentile. Fixed in org.apache.shiro:shiro-core 1.4.2.

References

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