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Fencer Intel
high 8.8

CVE-2019-11489 json

Incorrect Access Control in the Administrative Management Interface in SimplyBook.me Enterprise before 2019-04-23 allows Authenticated Low-…

published 7y ago modified 4mo ago also EUVD-2019-3162

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

Incorrect Access Control in the Administrative Management Interface in SimplyBook.me Enterprise before 2019-04-23 allows Authenticated Low-Priv Users to Elevate Privileges to Full Admin Rights via a crafted HTTP PUT Request, as demonstrated by modified JSON data to a /v2/rest/ URI.

Patch / fix

  • simplybook simplybook 2019-04-23

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Exploit prediction

2.52% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • cybrgrade.com https://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdf referenced PoC, tagged "exploit" by a source, unverified
  • blog.cybrgrade.com https://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

References

Sources

Fencer Intel 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.