Cyber Resilience

CVE-2025-51397

MediumPublic PoC

Published: 21 July 2025

Published
21 July 2025
Modified
07 August 2025
KEV Added
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Patch
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CVSS Score v3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS Score 0.0082 74.8th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-51397 is a medium-severity Logging of Excessive Data (CWE-779) vulnerability in Livehelperchat Live Helper Chat. Its CVSS base score is 5.4 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique JavaScript (T1059.007); ranked in the top 25.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

A stored cross-site scripting (XSS) vulnerability in the Facebook Chat module of Live Helper Chat v4.60 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Surname parameter under the Recipient' Lists.

CWE(s)
CWE-779

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
T1555.003 Credentials from Web Browsers Credential Access
Adversaries may acquire credentials from web browsers by reading files specific to the target browser.
attack.mitre.org →
Why these techniques?

Stored XSS enables arbitrary JavaScript execution (T1059.007) in admin browser context when viewing Recipients List, facilitating theft of web session cookies (T1539) and credentials from web browsers (T1555.003).

Affected Assets

livehelperchat
live helper chat
≤ 4.61

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AU-7 Audit Record Reduction and Report Generation
addresses: CWE-779

Audit record reduction explicitly manages excessive log volumes for review and reporting while preserving original content and ordering, reducing the impact of logging excessive data.

References