XS Channel Targeting Bypass in WordPress Plugin

Publication date: 2026-06-26

Last updated on: 2026-06-29

Assigner: HackerOne

Description

Bypass to the fix for CVE-2026-34916. Variants of such vectors have been also reported by phucrio and offsetmd. The fix can be bypassed either by sending a disallowed but otherwise valid plugin identifier as `type`, or using the `ox.setChannelTargeting` XML-RPC API method.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-26

Last Modified

2026-06-29

Generated

2026-07-17

AI Q&A

2026-06-26

EPSS Evaluated

2026-07-16

NVD

CVE-2026-50741

EUVD

EUVD-2026-39602

Affected Vendors & Products

Vendor	Product	Version / Range
revive-adserver	revive_adserver	to 6.0.8 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-94	The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

Executive Summary

This vulnerability is a bypass to the fix for a previous issue identified as CVE-2026-34916. It allows attackers to circumvent the security fix by either sending a disallowed but otherwise valid plugin identifier as the 'type' parameter or by using the 'ox.setChannelTargeting' XML-RPC API method.

Impact Analysis

The vulnerability has a high severity with a CVSS v3.0 base score of 8.8, indicating it can be exploited remotely with low attack complexity and requires low privileges. It can lead to high impact on confidentiality, integrity, and availability, meaning an attacker could potentially gain unauthorized access, modify data, or disrupt services.

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