CVE-2025-11238Network attack vector

Stored XSS via unescaped HTTP Referer

Published Oct 25, 2025 · Updated Oct 25, 2025

Stored XSS in the Watu Quiz plugin for WordPress 3.4.4 and earlier allows remote attackers to inject scripts via HTTP Referer. When Save source URL is enabled, quiz submission processing stores the attacker-controlled header and later renders it without sufficient sanitization or output escaping. No authentication is required, but the option must be enabled and a user must access a page that displays the stored source URL for the script to execute.

CVSS severity7.2
High
EPSS probability0.24%
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 the Watu Quiz plugin for WordPress 3.4.4 and earlier allows remote attackers to inject scripts via HTTP Referer. When Save source URL is enabled, quiz submission processing stores the attacker-controlled header and later renders it without sufficient sanitization or output escaping. No authentication is required, but the option must be enabled and a user must access a page that displays the stored source URL for the script to execute.

The record

CVE
CVE-2025-11238
Published
Oct 25, 2025
Updated
Oct 25, 2025
Vendor
Kiboko Labs Ltd.
Product
Watu Quiz
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 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=* <=3.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kiboko Labs Ltd. · Watu Quizversion=* <=3.4.4

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
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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