CVE-2020-5397Network attack vector

Cross-origin state changes via credential-bearing preflight requests

Published Jan 17, 2020 · Updated Sep 17, 2024

CSRF in Spring MVC and Spring WebFlux 5.2.0 through 5.2.2 allows remote attackers to trigger endpoint actions via CORS preflight requests. The web modules accept preflight requests at non-authenticated endpoints on the assumption that preflights carry no credentials, while Chrome sends TLS client certificates. Exposure requires such an endpoint or Chrome client-certificate authentication; the attack cannot send or receive an HTTP body.

CVSS severity5.3
Medium
EPSS probability2.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Spring MVC and Spring WebFlux 5.2.0 through 5.2.2 allows remote attackers to trigger endpoint actions via CORS preflight requests. The web modules accept preflight requests at non-authenticated endpoints on the assumption that preflights carry no credentials, while Chrome sends TLS client certificates. Exposure requires such an endpoint or Chrome client-certificate authentication; the attack cannot send or receive an HTTP body.

The record

CVE
CVE-2020-5397
Published
Jan 17, 2020
Updated
Sep 17, 2024
Vendor
Spring
Product
Spring Framework
Classifications
CWE-352, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 17, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.2 <v5.2.3.RELEASE

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring Frameworkversion=5.2 <v5.2.3.RELEASE

Published CVSS scores

2.6NIST NVDAV:N/AC:H/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3Pivotal Software, Inc.CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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