CVE-2023-20863 — In spring framework versions prior to 5

In spring framework versions prior to 5.2.24 release+ ,5.3.27+ and 6.0.8+ , it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service (DoS) condition.

01What is this vulnerability?

In spring framework versions prior to 5.2.24 release+ ,5.3.27+ and 6.0.8+ , it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service (DoS) condition.

02Affected products

Vendor	Product	Versions
n	a / Spring Framework	Spring framework versions 5.2.x.release prior to 5.2.24.release+, 5.3.x prior to 5.3.27+, 6.0.x prior to 6.0.8+ and older unsupported versions

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-04-13T00:00:00.000Z
• Last modified: 2025-02-07T16:48:13.438Z

09References

• spring.io — https://spring.io/security/cve-2023-20863
• security.netapp.com — https://security.netapp.com/advisory/ntap-20240524-0015/