How severe is CVE-2023-36133?

CVE-2023-36133 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-2023-36133 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36133?

CVE-2023-36133 affects Phpjabbers Availability Booking Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36133?

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-2023-36133 published?

CVE-2023-36133 was published on 2023-08-04 and last updated on 2026-06-17.

CVE-2023-36133

CVE-2023-36133 is a critical-severity vulnerability in Phpjabbers Availability Booking Calendar 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Phpjabbers Availability Booking Calendar
Published: 2023-08-04
Last modified: 2026-06-17

Description

PHPJabbers Availability Booking Calendar 5.0 is vulnerable to User Account Takeover through username/password change.

Frequently asked questions

What is CVE-2023-36133?: PHPJabbers Availability Booking Calendar 5.0 is vulnerable to User Account Takeover through username/password change.
How severe is CVE-2023-36133?: CVE-2023-36133 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-2023-36133 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36133?: CVE-2023-36133 affects Phpjabbers Availability Booking Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36133?: 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-2023-36133 published?: CVE-2023-36133 was published on 2023-08-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpjabbers:availability_booking_calendar:5.0:*:*:*:*:*:*:*

More vulnerabilities in Phpjabbers Availability Booking Calendar

CVE-2023-36132 — Critical (CVSS 9.8): PHP Jabbers Availability Booking Calendar 5.0 is vulnerable to Incorrect Access Control.
CVE-2023-36131 — Critical (CVSS 9.8): PHPJabbers Availability Booking Calendar 5.0 is vulnerable to Incorrect Access Control due to improper input validation…
CVE-2023-48207 — High (CVSS 8.8): Availability Booking Calendar 5.0 allows CSV injection via the unique ID field in the Reservations list component.
CVE-2023-48831 — High (CVSS 7.5): A lack of rate limiting in pjActionAJaxSend in Availability Booking Calendar 5.0 allows attackers to cause resource…
CVE-2023-48208 — Medium (CVSS 6.1): A Cross Site Scripting vulnerability in Availability Booking Calendar 5.0 allows an attacker to inject JavaScript via…
CVE-2023-48825 — Medium (CVSS 5.4): Availability Booking Calendar 5.0 is vulnerable to Multiple HTML Injection issues via SMS API Key or Default Country…

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