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CVE-2026-86838— Bookly < 28.3 - Unauthenticated Payment Bypass via Booking Price Manipulation

Quick assessment

Affected
Unknown Bookly
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.

Bookly WordPress 插件在 28.3 版本之前，在计算预约总价时未对客户端提交的预订数量值进行服务端验证，这允许未经身份验证的用户将总价降至零，从而绕过支付步骤并免费预订付费服务。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-86838

Vulnerability Information
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Vulnerability Title
Bookly < 28.3 - Unauthenticated Payment Bypass via Booking Price Manipulation
Source: CVE Program / CVE List V5
Vulnerability Description
The Bookly WordPress plugin before 28.3 does not validate client-supplied booking quantity values on the server before computing the appointment total, allowing unauthenticated users to reduce the total to zero and book paid services for free while bypassing the payment step.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Bookly 0 ~ 28.3 -

II. Public POCs for CVE-2026-86838

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III. Intelligence Information for CVE-2026-86838

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Other References for CVE-2026-86838 (1)

Same Patch Batch · Unknown · 2026-09-28 · 8 CVEs total

CVE-2026-84744 6.5 MEDIUM WPForms Lite 1.5.0.1 - 2.0.2 - Unauthenticated Arbitrary Shortcode Execution via Form Fiel
CVE-2026-88828 5.4 MEDIUM Blacklist Manager for WooCommerce 1.3.0 - 2.3.1 - Blocked User Restriction Bypass via XML-
CVE-2026-92996 5.3 MEDIUM Verge3D 4.1.0 - 4.13.0 - Unauthenticated Payment Bypass via v3d_payment_done
CVE-2026-89411 5.3 MEDIUM Paymattic < 4.6.26 - Unauthenticated Payment Bypass via Unbound Stripe PaymentIntent
CVE-2026-93000 SPS-Suite <= 1.4.0 - Unauthenticated Time-Based SQLi via Search
CVE-2026-89300 WP Verify API <= 1.0.0 - Unauthenticated Verification Code Email Sending to Arbitrary Reci
CVE-2026-89303 Post Voting System <= 1.0 - Subscriber+ SQLi via 'row' Parameter

IV. Related Vulnerabilities

Same product: Bookly
Same vendor: Unknown

V. Comments for CVE-2026-86838

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