CVE-2023-5956Public exploitNetwork attack vector

Stored XSS via unescaped quiz title

Published Jan 29, 2024 · Updated Jun 9, 2025

Stored XSS in Wp-Adv-Quiz 1.0.2 and earlier allows remote authenticated users to inject scripts through a crafted quiz title. The Quiz Overview stores the title without adequate sanitization or output escaping, then renders it when the overview is opened. Administrator-level access is required, and the issue is reachable when unfiltered_html is disabled, including on multisite installations, where the script executes in the viewer's site origin.

CVSS severity4.8
Medium
EPSS probability0.40%
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 Wp-Adv-Quiz 1.0.2 and earlier allows remote authenticated users to inject scripts through a crafted quiz title. The Quiz Overview stores the title without adequate sanitization or output escaping, then renders it when the overview is opened. Administrator-level access is required, and the issue is reachable when unfiltered_html is disabled, including on multisite installations, where the script executes in the viewer's site origin.

The record

CVE
CVE-2023-5956
Published
Jan 29, 2024
Updated
Jun 9, 2025
Vendor
Markus Begerow
Product
Wp-Adv-Quiz
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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=0 <=1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Markus Begerow · Wp-Adv-Quizversion=0 <=1.0.2

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.4WordfenceCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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