Skip to content
Fencer Vulns
medium 6.1

CVE-2021-4050 json

Cross-site Scripting (XSS) - Stored in livehelperchat/livehelperchat

published 2021-12-08 4 y ago modified 2026-06-17 4 mo ago also BIT-livehelperchat-2021-4050 , EUVD-2021-2491 , GHSA-97cc-825c-399g

cvss
6.1
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Patch / fix

  • livehelperchat livehelperchat/livehelperchat 2.0

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/27eb39d7-7636-4c4b-922c-a2f8fbe1ba05 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
GitHub 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N
OSV 3.0 6.1 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
packagist remdex/livehelperchat
<=2.0
 no fix listed
bitnami livehelperchat — no fix listed

Affected products

  • livehelperchat livehelperchat/livehelperchat

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.