CVE-2025-64633Network attack vector

Unauthenticated shortcode execution via unvalidated action value

Published Dec 16, 2025 · Updated Dec 16, 2025

Code injection in Colabrio Norebro Extra 1.6.8 and earlier allows remote attackers to execute arbitrary WordPress shortcodes. A public action accepts an unvalidated value and passes it to WordPress's do_shortcode function, which interprets attacker-supplied shortcode syntax. No authentication or user interaction is required, and the available shortcode handlers bound the site content or data exposed to the attacker.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Colabrio Norebro Extra 1.6.8 and earlier allows remote attackers to execute arbitrary WordPress shortcodes. A public action accepts an unvalidated value and passes it to WordPress's do_shortcode function, which interprets attacker-supplied shortcode syntax. No authentication or user interaction is required, and the available shortcode handlers bound the site content or data exposed to the attacker.

The record

CVE
CVE-2025-64633
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
Colabrio
Product
Norebro Extra
Classifications
CWE-80, CWE-94, CAPEC-242, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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=n/a <=<= 1.6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Colabrio · Norebro Extraversion=n/a <=<= 1.6.8

Published CVSS scores

5.3PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-94Improper Control of Generation of Code ('Code Injection')
CAPEC-242Code Injection
T1190Exploit Public-Facing Application

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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