CVE-2026-34889Network attack vector

Authenticated DOM-based XSS via unneutralized page input

Published Apr 1, 2026 · Updated Apr 1, 2026

DOM-based XSS in Brainstorm Force Ultimate Addons for WPBakery Page Builder before 3.21.4 allows remote authenticated users to run scripts. The plugin fails to neutralize attacker-controlled input during web page generation, but Patchstack has not identified the affected element, parameter, or code path. Exploitation requires low-privileged access and a user to view affected content; scripts run in that user's browser context.

CVSS severity6.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in Brainstorm Force Ultimate Addons for WPBakery Page Builder before 3.21.4 allows remote authenticated users to run scripts. The plugin fails to neutralize attacker-controlled input during web page generation, but Patchstack has not identified the affected element, parameter, or code path. Exploitation requires low-privileged access and a user to view affected content; scripts run in that user's browser context.

The record

CVE
CVE-2026-34889
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
Presto Made, Inc.
Product
Ultimate Addons for WPBakery Page Builder
Classifications
CWE-79, CAPEC-588, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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=n/a <3.21.4 changes=[{"at":"3.21.4","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Presto Made, Inc. · Ultimate Addons for WPBakery Page Builderversion=n/a <3.21.4 changes=[{"at":"3.21.4","status":"unaffected"}]

Published CVSS scores

6.5PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-588DOM-Based XSS
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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