How severe is CVE-2020-24916?

CVE-2020-24916 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-24916 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24916?

CVE-2020-24916 primarily affects Yaws. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-24916?

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

When was CVE-2020-24916 published?

CVE-2020-24916 was published on 2020-09-09 and last updated on 2026-06-17.

CVE-2020-24916

CVE-2020-24916 is a critical-severity vulnerability in Yaws with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 17% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Yaws
Published: 2020-09-09
Last modified: 2026-06-17

Description

CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.

Frequently asked questions

What is CVE-2020-24916?: CGI implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to OS command injection.
How severe is CVE-2020-24916?: CVE-2020-24916 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-24916 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 17% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24916?: CVE-2020-24916 primarily affects Yaws. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-24916?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-24916 published?: CVE-2020-24916 was published on 2020-09-09 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:yaws:yaws:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Yaws

CVE-2020-24379 — Critical (CVSS 9.8): WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection.
CVE-2017-10974 — High (CVSS 7.5): Yaws 1.91 allows Unauthenticated Remote File Disclosure via HTTP Directory Traversal with /%5C../ to port 8080. NOTE:…
CVE-2011-4350 — Medium (CVSS 6.5): Yaws 1.91 has a directory traversal vulnerability in the way certain URLs are processed. A remote authenticated user…
CVE-2016-1000108 — Medium (CVSS 6.1): yaws before 2.0.4 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and therefore does not…
CVE-2020-12872 — Medium (CVSS 5.5): yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow…
CVE-2010-4181 — Medium (CVSS 5.0): Directory traversal vulnerability in Yaws 1.89 allows remote attackers to read arbitrary files via ..\ (dot dot…

All CVEs affecting Yaws →

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