CVE-2026-11901

Name: CVE-2026-11901 — Vulnerability Record
Brand: Quanteta Data Lab
SKU: CVE-2026-11901

MEDIUM

CVSS v3.1: 5.3 · EPSS: 0.0018 (7.7 percentile)

NetworkNo privilegesNo user interactionVendor advisory ref

Source data as of: 2026-07-12 05:00:25 UTC

At a glance

Severity: MEDIUM
CVSS: 5.3 v3.1 · NVD
EPSS: 0.0018 (7.7 percentile) · FIRST.org
CISA KEV: No
Attack conditions (CVSS vector): NetworkNo privilegesNo user interaction · Source: NVD Vector
Published: 2026-07-11 · Modified: 2026-07-11
References: Jump to references (8)

CVSS / EPSS / KEV

CVSS v3.1 5.3 / 10 MEDIUM Source: NVD

EPSS 0.0018 7.7 percentile Source: FIRST.org

CISA KEV No Source: CISA

Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources

Description

The WP Hotel Booking plugin for WordPress is vulnerable to Insufficient Verification of Data Authenticity in all versions up to, and including, 2.3.1. This is due to the `web_hook_process_paypal_standard()` IPN handler selecting its PayPal validation endpoint from the attacker-controlled `$_REQUEST['test_ipn']` parameter, force-upgrading any `pending` transaction to `completed` when `test_ipn=1`, and omitting post-verification checks on `receiver_email`, `mc_currency`, and `txn_id` uniqueness after receiving a `VERIFIED` response from PayPal. This makes it possible for unauthenticated attackers to mark arbitrary hotel bookings as fully paid without submitting genuine payment to the merchant — either by routing IPN validation through PayPal's sandbox using a free sandbox account, or by replaying a previously verified IPN from a nominal payment to an attacker-controlled PayPal account. An attacker requires only a free PayPal sandbox account (or any PayPal account) to obtain a `VERIFIED` response; no site credentials or special configuration are needed.

Record details

CVE ID: CVE-2026-11901
CVSS (v3.1): 5.3 (MEDIUM)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Exploitability subscore: 3.9
Impact subscore: 1.4
EPSS: 0.0018 (7.7 percentile) — 2026-07-12
CISA KEV: No
Weakness (CWE): CWE-345
Affected configurations (CPE): 0
Published: 2026-07-11
Modified: 2026-07-11
Status: Received

References

Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.

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