CVE-2025-66118Network attack vector

Script execution via unescaped reflected input

Published Dec 18, 2025 · Updated Dec 18, 2025

Reflected XSS in BoldGrid Sprout Clients 3.2.1 and earlier allows remote attackers to execute scripts through a crafted link. The public records attribute the flaw to insufficient input neutralization during page generation but do not identify the request parameter, PHP function, or rendering path. Exploitation requires a user to follow the attacker-controlled link, after which script code runs in that user's browser context and can act with that user's WordPress session.

CVSS severity7.1
High
EPSS probability0.18%
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 BoldGrid Sprout Clients 3.2.1 and earlier allows remote attackers to execute scripts through a crafted link. The public records attribute the flaw to insufficient input neutralization during page generation but do not identify the request parameter, PHP function, or rendering path. Exploitation requires a user to follow the attacker-controlled link, after which script code runs in that user's browser context and can act with that user's WordPress session.

The record

CVE
CVE-2025-66118
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
Web Ventures
Product
Sprout Clients
Classifications
CWE-79, CAPEC-591, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 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=n/a <=<= 3.2.1 changes=[{"at":"3.2.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Web Ventures · Sprout Clientsversion=n/a <=<= 3.2.1 changes=[{"at":"3.2.2","status":"unaffected"}]

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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