CVE-2023-6923Network attack vector

Script execution via unescaped idsite output

Published Feb 20, 2024 · Updated Apr 8, 2026

Reflected XSS in Matomo Analytics for WordPress 4.15.3 and earlier allows remote attackers to run scripts through a crafted idsite value. The idsite value reaches generated page output without sufficient input sanitization or output escaping. Exploitation requires a victim to follow an attacker-controlled link, after which the script runs in that user’s browser context and can read or alter available page data.

CVSS severity6.1
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Matomo Analytics for WordPress 4.15.3 and earlier allows remote attackers to run scripts through a crafted idsite value. The idsite value reaches generated page output without sufficient input sanitization or output escaping. Exploitation requires a victim to follow an attacker-controlled link, after which the script runs in that user’s browser context and can read or alter available page data.

The record

CVE
CVE-2023-6923
Published
Feb 20, 2024
Updated
Apr 8, 2026
Vendor
Matomo
Product
Matomo Analytics for WordPress
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE 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 <=4.15.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Matomo · Matomo Analytics for WordPressversion=0 <=4.15.3

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1204.001User Execution: Malicious Link

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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