What’s Vulnerable › Vulnerabilities

CVE-2019-11488

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-04-25 · updated 2026-06-17
• Weakness: CWE-287

Description

Incorrect Access Control in the Account Access / Password Reset Link in SimplyBook.me Enterprise before 2019-04-23 allows Unauthorized Attackers to READ/WRITE Customer or Administrator data via a persistent HTTP GET Request Hash Link Replay, as demonstrated by a login-link from the browser history.

Affected products

• Simplybook: before 2019-04-23 — fixed in 2019-04-23

How to fix

Upgrade to a fixed version: Simplybook 2019-04-23. Check the vendor advisory for mitigations.

References

• https://blog.cybrgrade.com/CVE-2019-11488-SimplyBook.me-hash-replay-attack/
• https://cybrgrade.com/files/Report_SimplyBookIt_MD5_Hash_Replay_by_CybrGradeUKLtd.pdf
• https://blog.cybrgrade.com/CVE-2019-11488-SimplyBook.me-hash-replay-attack/
• https://cybrgrade.com/files/Report_SimplyBookIt_MD5_Hash_Replay_by_CybrGradeUKLtd.pdf

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