How severe is CVE-2020-11880?

CVE-2020-11880 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-11880 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11880?

CVE-2020-11880 affects Kde Kmail. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11880?

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

When was CVE-2020-11880 published?

CVE-2020-11880 was published on 2020-04-17 and last updated on 2026-06-17.

CVE-2020-11880

CVE-2020-11880 is a medium-severity vulnerability in Kde Kmail with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kde Kmail
Published: 2020-04-17
Last modified: 2026-06-17

Description

An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=..." parameter, a website (or other source of mailto links) can make KMail attach local files to a composed email message without showing a warning to the user, as demonstrated by an attach=.bash_history value.

Frequently asked questions

What is CVE-2020-11880?: An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=..." parameter, a website (or other source of mailto links) can make KMail attach local files to a composed email message without showing a warning to the user, as demonstrated by an attach=.bash_history value.
How severe is CVE-2020-11880?: CVE-2020-11880 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-11880 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11880?: CVE-2020-11880 affects Kde Kmail. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11880?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-11880 published?: CVE-2020-11880 was published on 2020-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kde:kmail:*:*:*:*:*:*:*:*

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