CVE-2019-11489 — 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

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HIGH

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

Published Apr 25, 2019

8.8

HIGH

CVSS 3.0

EPSS 2.52%

Description

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

2.52% 0.02516

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.02516

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	2.52% (0.02516)	84.28th	v5 (v2026.06.15)
Jun 15, 2026	2.56% (0.02563)	83.03th	v5 (v2026.06.15)
Jul 20, 2024	0.06% (0.00056)	23.84th	v3 (v2023.03.01)
Jun 20, 2024	0.06% (0.00056)	23.43th	v3 (v2023.03.01)
Mar 7, 2023	0.06% (0.00056)	21.40th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	9.03% (0.09029)	86.86th	v2 (v2022.01.01)
Feb 3, 2022	2.74% (0.02742)	63.06th	v5 (v2026.06.15)
Jan 6, 2022	2.74% (0.02742)	62.72th	v1
Sep 1, 2021	0.62% (0.00624)	45.04th	v1
Apr 14, 2021	0.62% (0.00624)	0.00th	v1

Weaknesses (0)

No CWE recorded.

References (2)

https://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/
x_refsource_MISCExploitThird Party Advisory
https://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdf
x_refsource_MISCExploitThird Party Advisory

Link	Providers	Tags
https://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/		x_refsource_MISCExploitThird Party Advisory
https://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdf		x_refsource_MISCExploitThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Apr 25, 2019

Updated Aug 4, 2024

Reserved Apr 23, 2019

Link CVE-2019-11489

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2019-11489

Red Hat

Severity n/a

Public date n/a

Links CVE-2019-11489