Is CVE-2021-42010 in the CISA KEV catalog?

No. CVE-2021-42010 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42010?

CVE-2021-42010 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-42010?

CVE-2021-42010 has an EPSS score of 1.46% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42010?

Upgrade heron to 0.20.5-incubating or later.

CVE & CISA-KEV Catalog

CVE-2021-42010

CRITICALEPSS 70th pctl

9.8

CVSS v3

NVD

Description

Heron versions <= 0.20.4-incubating allows CRLF log injection because of the lack of escaping in the log statements. Please update to version 0.20.5-incubating which addresses this issue.

CWE-116

How to fix

Remediation Available

heronNVD

Affected:< 0.20.5-incubatingFixed in:0.20.5-incubatingCVE-2021-42010derived 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

1.46%probability of exploitation in 30 days

70thpercentile

Elevated risk: more likely to be exploited than 70% of all known CVEs.

References

Vendor Advisory1

lists.apache.org

Third-Party Advisory1

openwall.com

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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 2025-05-07.