XSS in Livehelperchat Live Helper Chat
CVE-2025-51403
A stored cross-site scripting (XSS) vulnerability in the department assignment editing module of of Live Helper Chat v4.60 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Alias Nick parameter.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.015 (73.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: -0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/LiveHelperChat/livehelperchat/pull/2228/commits/2056503ad96e04467ec9… (Patch)
- www.dropbox.com/scl/fi/w7mur1fo4jb3harpx6om9/2025-05-08-21-38-14.mp4 (Exploit)
- github.com/Thewhiteevil/CVE-2025-51403 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-51403?
- CVE-2025-51403 is a medium-severity vulnerability in Livehelperchat Live Helper Chat, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2025-07-21.
- How severe is CVE-2025-51403?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-51403 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.