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Fencer Vulns
medium 5.4

CVE-2025-51397 json

A stored cross-site scripting (XSS) vulnerability in the Facebook Chat module of Live Helper Chat v4.60 allows attackers to execute arbitra…

published 2025-07-21 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-22148

cvss
5.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

Timeline

  1. Published
  2. First public exploit (EDB-52377)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

1.00% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52377 LiveHelperChat 4.61 - Stored Cross Site Scripting (XSS) via Operator Surname webapps, 2025-07-22
  • dropbox.com https://www.dropbox.com/scl/fi/qrbtcv8bir2i8ielguyi3/2025-05-09-13-58-50.mp4?rlkey=thcbqxuzpm37o73j0ywsu3h3u&st=fhird68s&dl=0 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/Thewhiteevil/CVE-2025-51397 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Classification

Weakness
  • CWE-779 Logging of Excessive Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.