CVE-2025-9560Network attack vector

Contributor-level stored XSS via unescaped shortcode attributes

Published Oct 11, 2025 · Updated Oct 11, 2025

Stored XSS in Extend Themes Colibri Page Builder 1.0.334 and earlier allows remote authenticated users to inject scripts into pages. The colibri_newsletter shortcode renders user-supplied attributes without sufficient sanitization or output escaping, so crafted attribute content is stored and emitted as executable markup. Contributor-level access is required to create the malicious page content; the script runs when a visitor opens the affected page.

CVSS severity6.4
Medium
EPSS probability0.23%
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 Extend Themes Colibri Page Builder 1.0.334 and earlier allows remote authenticated users to inject scripts into pages. The colibri_newsletter shortcode renders user-supplied attributes without sufficient sanitization or output escaping, so crafted attribute content is stored and emitted as executable markup. Contributor-level access is required to create the malicious page content; the script runs when a visitor opens the affected page.

The record

CVE
CVE-2025-9560
Published
Oct 11, 2025
Updated
Oct 11, 2025
Vendor
Extend Themes
Product
Colibri Page Builder
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 2025Record 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=* <=1.0.334

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Extend Themes · Colibri Page Builderversion=* <=1.0.334

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.

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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')
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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