Is CVE-2021-39181 in the CISA KEV catalog?

No. CVE-2021-39181 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-39181?

CVE-2021-39181 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-39181?

CVE-2021-39181 has an EPSS score of 1.91% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-39181?

Upgrade openolat to 15.5.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-39181

HIGHEPSS 77th pctl

8.8

CVSS v3

NVD

Description

OpenOlat is a web-based learning management system (LMS). Prior to version 15.3.18, 15.5.3, and 16.0.0, using a prepared import XML file (e.g. a course) any class on the Java classpath can be instantiated, including spring AOP bean factories. This can be used to execute code arbitrary code by the attacker. The attack requires an OpenOlat user account with the authoring role. It can not be exploited by unregistered users. The problem is fixed in versions 15.3.18, 15.5.3, and 16.0.0. There are no known workarounds aside from upgrading.

CWE-91

How to fix

Remediation Available

openolatNVD

Affected:>= 15.5.0, < 15.5.3Fixed in:15.5.3CVE-2021-39181derived 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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.91%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

github.com

Other references1

jira.openolat.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.