What is the CVSS score of CVE-2021-4049?

CVE-2021-4049 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.4%.

Is there a public PoC exploit available for CVE-2021-4049?

Yes, a public proof-of-concept exploit is available for CVE-2021-4049. Prioritise patching immediately. EPSS: 0.4%.

Is there a patch available for CVE-2021-4049?

Yes, a patch is available for CVE-2021-4049. Update the affected software to the latest version immediately.

Livehelperchat CVE-2021-4049

MEDIUM

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

2021-12-07 security@huntr.dev

CSRF Live Helper Chat Livehelperchat

6.5

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-352 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V3 - Web Frontend Security Anti-CSRF tokens, SameSite cookies MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could trick authenticated users into performing unintended actions by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.4% exploitation probability (EPSS)

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AnalysisAI

livehelperchat is vulnerable to Cross-Site Request Forgery (CSRF). Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement anti-CSRF tokens, validate Origin/Referer headers, use SameSite cookie attribute.

Affected Packages

composer remdex/livehelperchat no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in composer

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352), which allows attackers to trick authenticated users into performing unintended actions. livehelperchat is vulnerable to Cross-Site Request Forgery (CSRF) Affected products include: Livehelperchat Live Helper Chat.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

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

Threat Intelligence Overview

EPSS Score

0.4%

Top 65% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 0.4%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +32

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Request Forgery MEDIUM

Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.

Affected Products (CPE)NVD

cpe:2.3:a:livehelperchat:live_helper_chat:*:*:*:*:*:*:*:*

More in Livehelperchat

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CVE-2022-0935 HIGH This Week POC

8.8 Apr 07

Host Header injection in password Reset in GitHub repository livehelperchat/livehelperchat prior to 3.97. Rated high sev

CVE-2021-4131 HIGH This Week POC

8.8 Dec 18

livehelperchat is vulnerable to Cross-Site Request Forgery (CSRF). Rated high severity (CVSS 8.8), this vulnerability is

CVE-2022-1235 HIGH This Week POC

8.2 Apr 05

Weak secrethash can be brute-forced in GitHub repository livehelperchat/livehelperchat prior to 3.96. Rated high severit

CVE-2022-1213 HIGH This Week POC

8.1 Apr 05

SSRF filter bypass port 80, 433 in GitHub repository livehelperchat/livehelperchat prior to 3.67v. Rated high severity (

CVE-2022-1191 HIGH This Week POC

8.1 Mar 31

SSRF on index.php/cobrowse/proxycss/ in GitHub repository livehelperchat/livehelperchat prior to 3.96. Rated high severi

CVE-2022-1176 HIGH This Week POC

7.5 Mar 31

Loose comparison causes IDOR on multiple endpoints in GitHub repository livehelperchat/livehelperchat prior to 3.96. Rat

CVE-2021-4123 MEDIUM This Month POC

6.5 Dec 16

livehelperchat is vulnerable to Cross-Site Request Forgery (CSRF). Rated medium severity (CVSS 6.5), this vulnerability

CVE-2022-1530 MEDIUM This Month POC

6.1 Apr 29

Cross-site Scripting (XSS) in GitHub repository livehelperchat/livehelperchat prior to 3.99v. Rated medium severity (CVS

CVE-2022-1234 MEDIUM This Month POC

6.1 Apr 06

XSS in livehelperchat in GitHub repository livehelperchat/livehelperchat prior to 3.97. Rated medium severity (CVSS 6.1)

CVE-2021-4176 MEDIUM This Month POC

6.1 Dec 29

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

CVE-2021-4169 MEDIUM This Month POC

6.1 Dec 26

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

CVE-2021-4050 MEDIUM This Month POC

6.1 Dec 08

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

Same weakness CWE-352 – Cross-Site Request Forgery (CSRF)

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CVE-2016-6277 HIGH POC

8.8

CVE-2014-100005 HIGH POC

8.0

CVE-2013-5696 MEDIUM POC

6.8

CVE-2020-36836 HIGH POC

8.0

CVE-2015-2295 MEDIUM POC

6.8

CVE-2016-6897 MEDIUM POC

6.5

CVE-2022-41622 HIGH POC

8.8

CVE-2025-2907 CRITICAL POC

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Same technique CSRF

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CVE-2017-9757 HIGH POC

8.8

CVE-2013-4152 MEDIUM POC

6.8

CVE-2024-7094 CRITICAL

9.8

CVE-2015-4624 HIGH POC

7.5

References

Advisories & patches

PATCH https://github.com/livehelperchat/livehelperchat/commit/e7fe1aa6a087d4d21b2e8a0dadd2e08f42acbb57

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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