What is CVE-2021-4131?

CVE-2021-4131 is a high-severity vulnerability in Livehelperchat Live Helper Chat, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-12-18.

How severe is CVE-2021-4131?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-4131 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CSRF in Livehelperchat Live Helper Chat

CVE-2021-4131

livehelperchat is vulnerable to Cross-Site Request Forgery (CSRF)

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-12-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Livehelperchat Live Helper Chat
Livehelperchat Livehelperchat/livehelperchat — versions unspecified

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

huntr.dev/bounties/52dfac87-4fd3-4dfb-83d2-d39916764d43 (Exploit, Third Party Advisory)
github.com/livehelperchat/livehelperchat/commit/3b5d0a8a43595a7f05f2a81b76623a8… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-4131?: CVE-2021-4131 is a high-severity vulnerability in Livehelperchat Live Helper Chat, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-12-18.
How severe is CVE-2021-4131?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-4131 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.