How severe is CVE-2020-12872?

CVE-2020-12872 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-12872 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12872?

CVE-2020-12872 affects Yaws. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12872?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-12872 published?

CVE-2020-12872 was published on 2020-05-15 and last updated on 2026-06-17.

CVE-2020-12872

CVE-2020-12872 is a medium-severity vulnerability in Yaws with a CVSS 3.x base score of 5.5. 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-326.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Yaws
Published: 2020-05-15
Last modified: 2026-06-17

Description

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.

Frequently asked questions

What is CVE-2020-12872?: yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.
How severe is CVE-2020-12872?: CVE-2020-12872 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-12872 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12872?: CVE-2020-12872 affects Yaws. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12872?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12872 published?: CVE-2020-12872 was published on 2020-05-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yaws:yaws:*:*:*:*:*:*:*:*

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