What is CVE-2021-4123?

CVE-2021-4123 is a medium-severity vulnerability in Livehelperchat Live Helper Chat, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-12-16.

How severe is CVE-2021-4123?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2021-4123 known to be exploited?

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

CSRF in Livehelperchat Live Helper Chat

CVE-2021-4123

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

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-12-16 · last modified 2026-06-17.

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:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (39.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.7% 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/52182545-fdd6-4d4f-9fba-25010f7f8cba (Exploit, Patch, Third Party Advisory)
github.com/livehelperchat/livehelperchat/commit/2a98c69cf8899afb9a76d737527abb1… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-4123?: CVE-2021-4123 is a medium-severity vulnerability in Livehelperchat Live Helper Chat, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-12-16.
How severe is CVE-2021-4123?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2021-4123 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.