CVE-2026-39601— WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability
Quick assessment
Affected
WPdevelop Booking Calendar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
WPdevelop Booking Calendar 预订插件中存在并发使用共享资源且同步不当（竞态条件）漏洞，攻击者可利用此竞态条件实现恶意利用。该漏洞影响 Booking Calendar 插件：从 n/a 到 11.8.4 版本。
Possible ATT&CK Techniques 3 AI
T1246 T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| WPdevelop | Booking Calendar | ≤ 11.8.4 |
affected |
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I. Basic Information for CVE-2026-39601
Vulnerability Information
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Vulnerability Title
WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows Leveraging Race Conditions.This issue affects Booking Calendar: from n/a through 11.8.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| WPdevelop | Booking Calendar | 0 ~ 11.8.4 | - |
|
II. Public POCs for CVE-2026-39601
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-39601 (1)
IV. Related Vulnerabilities
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CVE-2026-93655
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WordPress Booking Calendar plugin <= 11.4.2 - Cross Site Scr
Same vendor: WPdevelop
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CVE-2026-93655
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CVE-2026-92561
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CVE-2026-74002
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CVE-2026-59558
WordPress Booking Calendar plugin <= 11.4.2 - Cross Site Scr
Same weakness: CWE-362
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V. Comments for CVE-2026-39601
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