CVE-2025-12033Network attack vector

Administrator stored XSS via unescaped activation code

Published Oct 22, 2025 · Updated Oct 22, 2025

Stored XSS in Ryan Petersen Simple Banner 3.0.10 and earlier allows remote authenticated users to execute scripts via an activation code. The plugin stores the pro_version_activation_code setting without sufficient sanitization and later emits it into a page without output escaping. Administrator-level access is required, and exposure is limited to multisite installations or sites where unfiltered_html is disabled; injected script runs when the affected page is viewed.

CVSS severity4.4
Medium
EPSS probability0.18%
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 Ryan Petersen Simple Banner 3.0.10 and earlier allows remote authenticated users to execute scripts via an activation code. The plugin stores the pro_version_activation_code setting without sufficient sanitization and later emits it into a page without output escaping. Administrator-level access is required, and exposure is limited to multisite installations or sites where unfiltered_html is disabled; injected script runs when the affected page is viewed.

The record

CVE
CVE-2025-12033
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
Ryan Petersen
Product
Simple Banner
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 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=* <=3.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Ryan Petersen · Simple Bannerversion=* <=3.0.10

Published CVSS scores

4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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