HOMEVULNERABILITIESCVE-2019-11489
HIGH

CVE-2019-11489

NVD-CWE-noinfoPublished: April 25, 2019· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2019-11489 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

simplybook1 product(s)
simplybook
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/
ADVISORYhttps://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdf
ADVISORYhttps://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/
ADVISORYhttps://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdf

All References (4)

→
https://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/Exploit · Third Party Advisory
→
https://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdfExploit · Third Party Advisory
→
https://blog.cybrgrade.com/CVE-2019-11489-SimplyBook.me-privesc/Exploit · Third Party Advisory
→
https://cybrgrade.com/files/Report_SimplyBookIt_Privesc_by_CybrGradeUKLtd.pdfExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2019-11489
CVSS Score8.8 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedApr 25, 2019

Related CVEs (NVD-CWE-noinfo)

CVE-2005-2700
10.0
CVE-2008-6546
10.0
CVE-2008-6566
10.0
CVE-2009-1216
10.0
CVE-2009-2543
10.0
CVE-2005-3463
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11489 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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