CVE-2023-51296Public exploitNetwork attack vector

Script execution via unneutralized HTML parameters

Published Feb 19, 2025 · Updated Nov 4, 2025

Cross-site scripting in PHPJabbers Event Booking Calendar 4.0 allows remote attackers to run script through crafted parameter values. The application fails to neutralize the name, plugin_sms_api_key, plugin_sms_country_code, and title values before placing them in generated HTML. Exploitation requires a user to render the crafted content, enabling script execution in that user’s browser context without interrupting the service.

CVSS severity6.1
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in PHPJabbers Event Booking Calendar 4.0 allows remote attackers to run script through crafted parameter values. The application fails to neutralize the name, plugin_sms_api_key, plugin_sms_country_code, and title values before placing them in generated HTML. Exploitation requires a user to render the crafted content, enabling script execution in that user’s browser context without interrupting the service.

The record

CVE
CVE-2023-51296
Published
Feb 19, 2025
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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