CVE-2020-5408

FAUCET Score

CVE-2020-5408 affects multiple versions of Spring Security, specifically 5.3.x, 5.2.x, 5.1.x, 5.0.x, and 4.2.x, due to the use of a fixed null initialization vector with CBC Mode in its queryable text encryptor. This vulnerability, rated Medium with a CVSS score of 6.5, allows an authenticated malicious user with access to encrypted data to potentially decrypt it via a dictionary attack, leading to a high impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 5.2.0, < 5.2.4CPE matchmatch criteria	cpe:2.3:a:pivotal_software:spring_security::::::::
		>= 5.3.0, < 5.3.2CPE matchmatch criteria	cpe:2.3:a:pivotal_software:spring_security::::::::
		>= 4.2.0, < 4.2.16CPE matchmatch criteria	cpe:2.3:a:vmware:spring_security::::::::
		>= 5.0.0, < 5.0.16CPE matchmatch criteria	cpe:2.3:a:vmware:spring_security::::::::
		>= 5.1.0, < 5.1.10CPE matchmatch criteria	cpe:2.3:a:vmware:spring_security::::::::

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

1.59%

Probability of exploitation in next 30 days

EPSS Percentile

73.2%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.0159 is in the 87th percentile among its peer group of 21,939 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mavenpatch availablevia ghsa

Product: org.springframework.security:spring-security-coreFixed in: 5.3.2

mavenpatch availablevia ghsa

Product: org.springframework.security:spring-security-coreFixed in: 5.2.4

mavenpatch availablevia ghsa

Product: org.springframework.security:spring-security-coreFixed in: 5.1.10

mavenpatch availablevia ghsa

Product: org.springframework.security:spring-security-coreFixed in: 5.0.16

mavenpatch availablevia ghsa

Product: org.springframework.security:spring-security-coreFixed in: 4.2.16

Vendor Advisories (1)

mavenGHSA-2ppp-9496-p23qmedium

Insufficient Entropy in Spring Security

Jun 15, 2020

References

tanzu.vmware.com / security/cve-2020-5408

Vendor Advisory

oracle.com / security-alerts/cpuApr2021.html

oracle.com / security-alerts/cpujan2021.html

oracle.com / security-alerts/cpuoct2020.html