CVE-2023-0787Public exploitNetwork attack vector

Stored XSS via unencoded open-question fields

Published Feb 12, 2023 · Updated Mar 24, 2025

Stored cross-site scripting in phpMyFAQ before 3.1.11 allows remote authenticated users to execute script in another user's browser. Faq::renderOpenQuestions inserts stored usernames directly into HTML and applies strip_tags rather than entity encoding to question text. An attacker must submit an open question and wait for another user to view the listing; script then runs under that viewer's application origin.

CVSS severity8.1
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in phpMyFAQ before 3.1.11 allows remote authenticated users to execute script in another user's browser. Faq::renderOpenQuestions inserts stored usernames directly into HTML and applies strip_tags rather than entity encoding to question text. An attacker must submit an open question and wait for another user to view the listing; script then runs under that viewer's application origin.

The record

CVE
CVE-2023-0787
Published
Feb 12, 2023
Updated
Mar 24, 2025
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 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=unspecified <3.1.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=unspecified <3.1.11

Published CVSS scores

5.4GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.1huntr.dev CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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