CVE-2023-2416Public exploitNetwork attack vector

Scheduler denial of service via nonce-free logout

Published Jun 3, 2023 · Updated Apr 8, 2026

CSRF in vcita's Online Booking & Scheduling Calendar for WordPress 4.5 and earlier allows remote attackers to interrupt scheduling. The vcita_logout_callback function accepts a forged vcita_logout AJAX request without verifying a nonce and disconnects the linked vcita account. Exploitation requires a logged-in site user to submit the request, after which appointment scheduling remains unavailable while the account is disconnected.

CVSS severity5.4
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in vcita's Online Booking & Scheduling Calendar for WordPress 4.5 and earlier allows remote attackers to interrupt scheduling. The vcita_logout_callback function accepts a forged vcita_logout AJAX request without verifying a nonce and disconnects the linked vcita account. Exploitation requires a logged-in site user to submit the request, after which appointment scheduling remains unavailable while the account is disconnected.

The record

CVE
CVE-2023-2416
Published
Jun 3, 2023
Updated
Apr 8, 2026
Vendor
vcita
Product
Online Booking & Scheduling Calendar for WordPress by vcita
Classifications
CWE-352, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vcita · Online Booking & Scheduling Calendar for WordPress by vcitaversion=0 <=4.5

Published CVSS scores

5.4WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

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-352Cross-Site Request Forgery (CSRF)
T1204.001User Execution: Malicious Link

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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