How severe is CVE-2019-11887?

CVE-2019-11887 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-11887 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11887?

CVE-2019-11887 affects Simplybook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11887?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-11887 published?

CVE-2019-11887 was published on 2019-05-17 and last updated on 2026-06-17.

CVE-2019-11887

CVE-2019-11887 is a critical-severity vulnerability in Simplybook with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Simplybook
Published: 2019-05-17
Last modified: 2026-06-17

Description

SimplyBook.me through 2019-05-11 does not properly restrict File Upload which could allow remote code execution.

Frequently asked questions

What is CVE-2019-11887?: SimplyBook.me through 2019-05-11 does not properly restrict File Upload which could allow remote code execution.
How severe is CVE-2019-11887?: CVE-2019-11887 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-11887 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11887?: CVE-2019-11887 affects Simplybook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11887?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-11887 published?: CVE-2019-11887 was published on 2019-05-17 and last updated on 2026-06-17.

References

https://news.simplybook.me/notification/

Affected products (1)

cpe:2.3:a:simplybook:simplybook:*:*:*:*:*:*:*:*

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