CVE-2022-4216Public exploitNetwork attack vector

Stored script execution via unescaped Facebook App ID

Published Dec 2, 2022 · Updated Apr 8, 2026

Stored XSS in Prasunsen Chained Quiz 1.3.2.2 and earlier allows remote authenticated users to execute scripts via a saved Facebook App ID. The Social Sharing settings page stores the facebook_appid value after text-field sanitization and renders it into an HTML attribute without attribute escaping. Administrator access is required to save the payload; it executes when a user interacts with the affected input and can perform actions with that user's WordPress privileges.

CVSS severity5.5
Medium
EPSS probability0.66%
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 Prasunsen Chained Quiz 1.3.2.2 and earlier allows remote authenticated users to execute scripts via a saved Facebook App ID. The Social Sharing settings page stores the facebook_appid value after text-field sanitization and renders it into an HTML attribute without attribute escaping. Administrator access is required to save the payload; it executes when a user interacts with the affected input and can perform actions with that user's WordPress privileges.

The record

CVE
CVE-2022-4216
Published
Dec 2, 2022
Updated
Apr 8, 2026
Vendor
Prasunsen
Product
Chained Quiz
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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 <=1.3.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Prasunsen · Chained Quizversion=0 <=1.3.2.2

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
5.5WordfenceCVSS:3.1/AV:N/AC:L/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 exploitPublished

Weakness, pattern, technique

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