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Fencer Vulns
critical 9.8

CVE-2018-16521 json

An XML External Entity (XXE) vulnerability exists in HTML Form Entry 3.7.0, as distributed in OpenMRS Reference Application 2.8.0.

published 2018-09-05 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-8330

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

An XML External Entity (XXE) vulnerability exists in HTML Form Entry 3.7.0, as distributed in OpenMRS Reference Application 2.8.0.

Patch / fix

Exploit prediction

1.92% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/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.