CVE-2024-9371Network attack vector

Reflected XSS via unescaped remove_query_arg URL

Published Nov 21, 2024 · Updated Apr 8, 2026

Reflected XSS in WPMU DEV Branda 3.4.21 and earlier allows remote attackers to run scripts in a user's browser through a crafted URL. In class-branda-admin.php, a URL returned by remove_query_arg is inserted into an anchor destination without appropriate escaping. Exploitation requires no account but requires a user to follow the attacker-supplied link; execution remains in the victim's browser context.

CVSS severity6.1
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in WPMU DEV Branda 3.4.21 and earlier allows remote attackers to run scripts in a user's browser through a crafted URL. In class-branda-admin.php, a URL returned by remove_query_arg is inserted into an anchor destination without appropriate escaping. Exploitation requires no account but requires a user to follow the attacker-supplied link; execution remains in the victim's browser context.

The record

CVE
CVE-2024-9371
Published
Nov 21, 2024
Updated
Apr 8, 2026
Vendor
WPMU DEV
Product
Branda
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.4.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPMU DEV · Brandaversion=0 <=3.4.21

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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