What is CVE-2018-1000835?

CVE-2018-1000835 is a critical-severity vulnerability in Keepassdx Keepass Dx, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 10.0/10. Published 2018-12-20.

How severe is CVE-2018-1000835?

Critical severity. CVSS v3 base score is 10.0 out of 10.

XXE in Keepassdx Keepass Dx

CVE-2018-1000835

KeePassDX version <= 2.5.0.0beta17 contains a XML External Entity (XXE) vulnerability in kdbx file parser that can result in Disclosure of confidential data, denial of service, SSRF, port scanning.

Vulnerability class: XXE (XML External Entity)

Published 2018-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 77.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Keepassdx Keepass Dx — versions 2.5.0.0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

github.com/Kunzisoft/KeePassDX/issues/200 (Third Party Advisory, Issue Tracking)
0dd.zone/2018/10/28/KeePassDX-XXE/ (Third Party Advisory)

Frequently asked questions

What is CVE-2018-1000835?: CVE-2018-1000835 is a critical-severity vulnerability in Keepassdx Keepass Dx, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 10.0/10. Published 2018-12-20.
How severe is CVE-2018-1000835?: Critical severity. CVSS v3 base score is 10.0 out of 10.