CVE-2026-14921Public exploitNetwork attack vector

Contributor-level stored XSS via unescaped shortcode link

Published Jul 31, 2026 · Updated Jul 31, 2026

Stored XSS in Ultimate Addons for WPBakery Page Builder before 3.21.5 allows remote authenticated users to execute browser scripts. Ultimate_VC_Addons::uavc_link_init() writes a URL-decoded ult_buttons shortcode value into an href attribute without esc_url(), preserving a javascript: URI. Contributor access is sufficient, but an Editor or Administrator must publish the post and a victim must click the same-tab link before the script runs.

CVSS severity7.5
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Ultimate Addons for WPBakery Page Builder before 3.21.5 allows remote authenticated users to execute browser scripts. Ultimate_VC_Addons::uavc_link_init() writes a URL-decoded ult_buttons shortcode value into an href attribute without esc_url(), preserving a javascript: URI. Contributor access is sufficient, but an Editor or Administrator must publish the post and a victim must click the same-tab link before the script runs.

The record

CVE
CVE-2026-14921
Published
Jul 31, 2026
Updated
Jul 31, 2026
Vendor
Presto Made, Inc.
Product
Ultimate Addons for WPBakery Page Builder
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 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 <3.21.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Presto Made, Inc. · Ultimate Addons for WPBakery Page Builderversion=0 <3.21.5

Published CVSS scores

7.5WPScanCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
6.1CISA-ADPCVSS: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 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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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