CVE-2018-1000831

Name: CVE-2018-1000831
Creator: NVD / NIST
Published: 2018-12-20T15:29:01.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.91%

Last modified Jun 17, 2026

CVE-2018-1000831 is a vulnerability of currently unknown severity. K9Mail version <= v5.600 contains a XML External Entity (XXE) vulnerability in WebDAV response parser that can result in Disclosure of confidential data, denial of service, SSRF, port scanning. This attack appear to be exploitable via malicious WebDAV server or intercept the reponse of a valid WebDAV server.. EPSS estimates a 1.91% chance of exploitation in the next 30 days.

Description

K9Mail version <= v5.600 contains a XML External Entity (XXE) vulnerability in WebDAV response parser that can result in Disclosure of confidential data, denial of service, SSRF, port scanning. This attack appear to be exploitable via malicious WebDAV server or intercept the reponse of a valid WebDAV server.

Metrics

EPSS Probability

1.91%

77.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
K9mail	K-9 Mail	<= 5.600

References

https://0dd.zone/2018/10/28/k9mail-XXE-MitM/Third Party Advisory
https://github.com/k9mail/k-9/issues/3681Issue Tracking, Third Party Advisory
https://0dd.zone/2018/10/28/k9mail-XXE-MitM/Third Party Advisory
https://github.com/k9mail/k-9/issues/3681Issue Tracking, Third Party Advisory

Timeline

Published: Dec 20, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000831?

How severe is CVE-2018-1000831?

Severity scoring for CVE-2018-1000831 is pending analysis. The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000831?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1000831?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST