CVE-2026-13334

Mang Board WP <= 2.3.4 - Reflected Cross-Site Scripting via 'stag' Parameter

2026-07-08 19:17

Strategic Overview

Status: Patched in 2.3.5
Affected Plugin: Mang Board WP
Affected Version: <= 2.3.4
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2026-13334

At a glance

CVE-2026-13334 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Mang Board WP WordPress plugin, affecting versions <= 2.3.4. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.3.5; sites on affected versions should update now. Disclosed July 2026, reported by Wordfence PRISM.

Vulnerability Overview

The Mang Board WP plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'stag' parameter in all versions up to, and including, 2.3.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Mang Board WP <= 2.3.4 carries this weakness at stag, and reaching it takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Mang Board WP the fix is 2.3.5: builds <= 2.3.4 are affected, anything from 2.3.5 onward is not.

Remediation

Update to version 2.3.5, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Mang Board WP: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Mang Board WP 2.3.5 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-13334 https://www.wordfence.com/threat-intel/vulnerabilities/id/0f42b2be-2a7d-470a-896d-6148e31e4cce https://nvd.nist.gov/vuln/detail/CVE-2026-13334

Related records

Same weakness class

Other vulnerabilities in Mang Board WP

CVSS Vector

6.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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