CVE-2023-36133

CRITICALNVD 9.89.8—

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 50.0%
KEV: Not listed

Published

August 4, 2023

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated Jun 22, 2026

No patch confirmed yet.

generic

Availability Booking Calendar | Calendar Booking System | PHPJabbers

https://www.phpjabbers.com/availability-booking-calendar/

Data Freshness Timeline

(refreshed 14× in last 7d / 58× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-23 21:31 UTCEPSS rescore
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2026-06-22 14:24 UTCEPSS rescore
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2026-06-10 13:21 UTCEPSS rescore
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2026-05-31 22:30 UTCEPSS rescore
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2026-05-26 07:18 UTCEPSS rescore
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2026-05-26 07:18 UTCEPSS rescore
2026-05-24 20:09 UTCEG score recompute
2026-05-24 20:09 UTCGHSA enrichment
2026-05-24 16:52 UTCEPSS rescore

Frequently asked(5)

What is CVE-2023-36133?

CVE-2023-36133 is a critical vulnerability published on August 4, 2023. PHPJabbers Availability Booking Calendar 5.0 is vulnerable to User Account Takeover through username/password change.

When was CVE-2023-36133 disclosed?

CVE-2023-36133 was first published in the National Vulnerability Database on August 4, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-36133 actively exploited?

CVE-2023-36133 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-36133?

CVE-2023-36133 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2023-36133?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-36133, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-36133

📅 Published

🔄 Last Modified

📋 Advisory Details (1)