Is CVE-2020-1959 in the CISA KEV catalog?

No. CVE-2020-1959 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-1959?

CVE-2020-1959 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-1959?

CVE-2020-1959 has an EPSS score of 4.82% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-1959?

Upgrade syncope to 2.1.6 or later.

CVE & CISA-KEV Catalog

CVE-2020-1959

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

Description

A Server-Side Template Injection was identified in Apache Syncope prior to 2.1.6 enabling attackers to inject arbitrary Java EL expressions, leading to an unauthenticated Remote Code Execution (RCE) vulnerability. Apache Syncope uses Java Bean Validation (JSR 380) custom constraint validators. When building custom constraint violation error messages, they support different types of interpolation, including Java EL expressions. Therefore, if an attacker can inject arbitrary data in the error message template being passed, they will be able to run arbitrary Java code.

CWE-917

How to fix

Remediation Available

syncopeNVD

Affected:>= 2.1.0, < 2.1.6Fixed in:2.1.6CVE-2020-1959derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.82%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Vendor Advisory1

syncope.apache.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.