How severe is CVE-2021-4179?

CVE-2021-4179 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-4179 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-4179?

CVE-2021-4179 affects Livehelperchat Live Helper Chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-4179?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-4179 published?

CVE-2021-4179 was published on 2021-12-28 and last updated on 2026-06-17.

CVE-2021-4179

CVE-2021-4179 is a medium-severity vulnerability in Livehelperchat Live Helper Chat with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Livehelperchat Live Helper Chat
Published: 2021-12-28
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-4179?: livehelperchat is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How severe is CVE-2021-4179?: CVE-2021-4179 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-4179 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-4179?: CVE-2021-4179 affects Livehelperchat Live Helper Chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-4179?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-4179 published?: CVE-2021-4179 was published on 2021-12-28 and last updated on 2026-06-17.

References

Affected products (1)

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

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