How severe is CVE-2020-2253?

CVE-2020-2253 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-2253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-2253?

CVE-2020-2253 affects Jenkins Email Extension. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-2253?

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

When was CVE-2020-2253 published?

CVE-2020-2253 was published on 2020-09-16 and last updated on 2026-06-17.

CVE-2020-2253

CVE-2020-2253 is a medium-severity vulnerability in Jenkins Email Extension with a CVSS 3.x base score of 4.8. 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-295.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 5.8
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Jenkins Email Extension
Published: 2020-09-16
Last modified: 2026-06-17

Description

Jenkins Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server.

Frequently asked questions

What is CVE-2020-2253?: Jenkins Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server.
How severe is CVE-2020-2253?: CVE-2020-2253 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-2253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-2253?: CVE-2020-2253 affects Jenkins Email Extension. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-2253?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-2253 published?: CVE-2020-2253 was published on 2020-09-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:jenkins:email_extension:*:*:*:*:*:jenkins:*:*

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