PatchTheCVECVE-2020-11880: An issue was discovered in KDE KMail before 19.12.3
CVE-2020-11880 is a medium-severity flaw (CVSS 6.5) affecting kmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.9% (top 39%) |
| CISA exploited list | No |
| Published | 2020-04-17 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-11880?
kmail: upgrade to 19.12.3. Exact commands for each OS are on this page.
Is CVE-2020-11880 being exploited?
CVE-2020-11880 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-11880 affect?
CVE-2020-11880 affects kmail. Severity is medium (CVSS 6.5). 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 sho
How urgent is CVE-2020-11880?
Priority 43/100. Remotely exploitable, no login, no user action
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