CVE-2026-13295Network attack vector

Contributor-level stored XSS via unsanitized panels_data

Published Jun 27, 2026 · Updated Jun 27, 2026

Stored XSS in Page Builder by SiteOrigin 2.34.3 and earlier allows remote authenticated users to inject scripts through panels_data. The plugin stores Contributor-supplied panels_data as post meta without sanitizing WP_Widget_Custom_HTML content, then renders that content verbatim on the frontend. Contributor access to an editable post satisfies the save-time nonce and capability checks, and viewing the poisoned page executes the script in the visitor's browser.

CVSS severity6.4
Medium
EPSS probability0.42%
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 Page Builder by SiteOrigin 2.34.3 and earlier allows remote authenticated users to inject scripts through panels_data. The plugin stores Contributor-supplied panels_data as post meta without sanitizing WP_Widget_Custom_HTML content, then renders that content verbatim on the frontend. Contributor access to an editable post satisfies the save-time nonce and capability checks, and viewing the poisoned page executes the script in the visitor's browser.

The record

CVE
CVE-2026-13295
Published
Jun 27, 2026
Updated
Jun 27, 2026
Vendor
SiteOrigin
Product
Page Builder by SiteOrigin
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 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 <=2.34.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SiteOrigin · Page Builder by SiteOriginversion=0 <=2.34.3

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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