How severe is CVE-2020-5407?

CVE-2020-5407 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5407 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5407?

CVE-2020-5407 affects Pivotal Software Spring Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5407?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5407 published?

CVE-2020-5407 was published on 2020-05-13 and last updated on 2026-06-17.

CVE-2020-5407

CVE-2020-5407 is a high-severity vulnerability in Pivotal Software Spring Security with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-347.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Pivotal Software Spring Security
Published: 2020-05-13
Last modified: 2026-06-17

Description

Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.

Frequently asked questions

What is CVE-2020-5407?: Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.
How severe is CVE-2020-5407?: CVE-2020-5407 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5407 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5407?: CVE-2020-5407 affects Pivotal Software Spring Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5407?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5407 published?: CVE-2020-5407 was published on 2020-05-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pivotal_software:spring_security:*:*:*:*:*:*:*:*

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