Stored script execution via unescaped operator surname
Published Jul 21, 2025 · Updated Jul 22, 2025
Stored XSS in the Facebook Chat module of Live Helper Chat 4.60 allows remote authenticated users to execute scripts in an administrator’s browser. The Operator Surname field accepts and stores unescaped HTML, which the Recipients List later renders when the operator is shown as its owner. Operator access is required to save the payload, and execution requires an administrator or other higher-privileged user to view the affected list; the resulting script runs in that viewer’s session.
Summary
What happened
Stored XSS in the Facebook Chat module of Live Helper Chat 4.60 allows remote authenticated users to execute scripts in an administrator’s browser. The Operator Surname field accepts and stores unescaped HTML, which the Recipients List later renders when the operator is shown as its owner. Operator access is required to save the payload, and execution requires an administrator or other higher-privileged user to view the affected list; the resulting script runs in that viewer’s session.
The record
- CVE
- CVE-2025-51397
- Published
- Jul 21, 2025
- Updated
- Jul 22, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-779, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 21, 2025CVE publishedPublication date reported by the CVE source.
- Jul 22, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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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.
Public exploit references
- LiveHelperChat stored XSS via Operator Surnameproof of concept · unverified
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Technologies
Your stack
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Your stack
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