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Fencer Vulns
high 7.8

CVE-2018-1000548 json

Umlet version < 14.3 contains a XML External Entity (XXE) vulnerability in File parsing that can result in disclosure of confidential data,…

published 2018-06-26 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1937

cvss
7.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

Umlet version < 14.3 contains a XML External Entity (XXE) vulnerability in File parsing that can result in disclosure of confidential data, denial of service, server side request forgery. This attack appear to be exploitable via Specially crafted UXF file. This vulnerability appears to have been fixed in 14.3.

Patch / fix

  • umlet umlet 14.3
  • umlet Ubuntu 26.04 LTS, Ubuntu 25.10 15.1+ds-1

ubuntu advisories UBUNTU-CVE-2018-1000548

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/umlet/umlet/issues/500 referenced PoC, tagged "exploit" by a source, unverified
  • 0dd.zone http://0dd.zone/2018/04/23/UMLet-XXE/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.8 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.