How severe is CVE-2023-51293?

CVE-2023-51293 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-51293 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51293?

CVE-2023-51293 affects Phpjabbers Event Booking Calendar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-51293?

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

Does CVE-2023-51293 have an EU (EUVD) identifier?

Yes. CVE-2023-51293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56014.

When was CVE-2023-51293 published?

CVE-2023-51293 was published on 2025-02-19 and last updated on 2026-06-17.

CVE-2023-51293

CVE-2023-51293 is a high-severity vulnerability in Phpjabbers Event Booking Calendar with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56014
Weakness: CWE-400
Affected product: Phpjabbers Event Booking Calendar
Published: 2025-02-19
Last modified: 2026-06-17

Description

A lack of rate limiting in the 'Forgot Password', 'Email Settings' feature of PHPJabbers Event Booking Calendar v4.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.

Frequently asked questions

What is CVE-2023-51293?: A lack of rate limiting in the 'Forgot Password', 'Email Settings' feature of PHPJabbers Event Booking Calendar v4.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.
How severe is CVE-2023-51293?: CVE-2023-51293 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-51293 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51293?: CVE-2023-51293 affects Phpjabbers Event Booking Calendar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-51293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-51293 have an EU (EUVD) identifier?: Yes. CVE-2023-51293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56014.
When was CVE-2023-51293 published?: CVE-2023-51293 was published on 2025-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpjabbers:event_booking_calendar:4.0:*:*:*:*:*:*:*

More vulnerabilities in Phpjabbers Event Booking Calendar

CVE-2023-40765 — Critical (CVSS 9.8): User enumeration is found in PHPJabbers Event Booking Calendar v4.0. This issue occurs during password recovery, where…
CVE-2014-10015 — High (CVSS 7.5): SQL injection vulnerability in load-calendar.php in PHPJabbers Event Booking Calendar 2.0 allows remote attackers to…
CVE-2014-10014 — Medium (CVSS 6.8): Multiple cross-site request forgery (CSRF) vulnerabilities in PHPJabbers Event Booking Calendar 2.0 allow remote…
CVE-2023-51295 — Medium (CVSS 6.5): PHPJabbers Event Booking Calendar v4.0 is vulnerable to Multiple HTML Injection in the "name, plugin_sms_api_key,…
CVE-2023-51296 — Medium (CVSS 6.1): PHPJabbers Event Booking Calendar v4.0 is vulnerable to Cross-Site Scripting (XSS) in the "name, plugin_sms_api_key,…
CVE-2023-51298 — Medium (CVSS 4.7): PHPJabbers Event Booking Calendar v4.0 is vulnerable to CSV Injection vulnerability which allows an attacker to execute…

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