How severe is CVE-2021-34190?

CVE-2021-34190 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-34190 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34190?

CVE-2021-34190 affects Issabel Pbx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34190?

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

When was CVE-2021-34190 published?

CVE-2021-34190 was published on 2021-07-06 and last updated on 2026-06-17.

CVE-2021-34190

CVE-2021-34190 is a medium-severity vulnerability in Issabel Pbx with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Issabel Pbx
Published: 2021-07-06
Last modified: 2026-06-17

Description

A stored cross site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the "Name" or "Prefix" fields under the "Create New Rate" module.

Frequently asked questions

What is CVE-2021-34190?: A stored cross site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the "Name" or "Prefix" fields under the "Create New Rate" module.
How severe is CVE-2021-34190?: CVE-2021-34190 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-34190 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34190?: CVE-2021-34190 affects Issabel Pbx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34190?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34190 published?: CVE-2021-34190 was published on 2021-07-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:issabel:pbx:4:*:*:*:*:*:*:*

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