CVE-2021-4176 json
Cross-site Scripting (XSS) - Reflected in livehelperchat/livehelperchat
published 2021-12-29 4 y ago modified 2026-06-17 4 mo ago also BIT-livehelperchat-2021-4176 , EUVD-2021-34038
- cvss
- 5.4
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Patch / fix
- bitnami livehelperchat 3.91.0
- livehelperchat live_helper_chat 3.91
Exploit prediction
0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/8b531ae9-2d36-43ff-af33-4d81acfb2f27 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 5.4 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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 | 5.4 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | livehelperchat | <3.91.0 |
3.91.0 |
Affected products
- livehelperchat livehelperchat/livehelperchat
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/livehelperchat/livehelperchat/commit/1f67cf9f251289a5094774307c2c3d638f9f0ba6
patch, third-party-advisory, web
-
huntr.dev
/bounties/8b531ae9-2d36-43ff-af33-4d81acfb2f27
exploit, patch, third-party-advisory, web
Sources
- CVE List CVE-2021-4176
- NVD CVE-2021-4176
- OSV BIT-livehelperchat-2021-4176
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.