CVE-2025-22521Network attack vector

Unauthenticated script execution in users' browsers

Published Jan 9, 2025 · Updated Apr 28, 2026

Reflected XSS in Scott Farrell wp Hosting Performance Check 2.18.8 and earlier allows remote attackers to run scripts in users' browsers. The application reflects attacker-controlled request data into a generated page without adequate neutralization; the affected parameter and code path are undisclosed. Exploitation requires a user to open a crafted link, after which the script runs in that user's site origin and can read or modify browser-accessible data.

CVSS severity7.1
High
EPSS probability0.32%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Scott Farrell wp Hosting Performance Check 2.18.8 and earlier allows remote attackers to run scripts in users' browsers. The application reflects attacker-controlled request data into a generated page without adequate neutralization; the affected parameter and code path are undisclosed. Exploitation requires a user to open a crafted link, after which the script runs in that user's site origin and can read or modify browser-accessible data.

The record

CVE
CVE-2025-22521
Published
Jan 9, 2025
Updated
Apr 28, 2026
Vendor
Scott Farrell
Product
wp Hosting Performance Check
Classifications
CWE-79, CAPEC-591, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <=2.18.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Scott Farrell · wp Hosting Performance Checkversion=0 <=2.18.8

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 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')
CAPEC-591Reflected XSS
T1203Exploitation for Client Execution

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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