CVE-2023-6890Network attack vector

Stored XSS via unsanitized FAQ content

Published Dec 16, 2023 · Updated Aug 2, 2024

Stored XSS in phpMyFAQ before 3.1.17 allows remote authenticated users to execute script via crafted FAQ content. FaqHelper and SearchHelper rendered category, FAQ, and search-result fields without converting untrusted HTML to entities, allowing stored payloads to run when pages were viewed. Exploitation requires an account permitted to add or modify FAQ content and a victim to load the affected page; impact is client-side script execution in the victim session.

CVSS severity6.7
Medium
EPSS probability0.46%
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 phpMyFAQ before 3.1.17 allows remote authenticated users to execute script via crafted FAQ content. FaqHelper and SearchHelper rendered category, FAQ, and search-result fields without converting untrusted HTML to entities, allowing stored payloads to run when pages were viewed. Exploitation requires an account permitted to add or modify FAQ content and a victim to load the affected page; impact is client-side script execution in the victim session.

The record

CVE
CVE-2023-6890
Published
Dec 16, 2023
Updated
Aug 2, 2024
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=unspecified <3.1.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=unspecified <3.1.17

Published CVSS scores

6.7GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H

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
Privilegesauthenticated
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.

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Technologies

Your stack

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Your stack

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