How severe is CVE-2021-3279?

CVE-2021-3279 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-3279 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3279?

CVE-2021-3279 affects Fortics Szchat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3279?

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

When was CVE-2021-3279 published?

CVE-2021-3279 was published on 2021-07-19 and last updated on 2026-06-17.

CVE-2021-3279

CVE-2021-3279 is a medium-severity vulnerability in Fortics Szchat with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortics Szchat
Published: 2021-07-19
Last modified: 2026-06-17

Description

sz.chat version 4 allows injection of web scripts and HTML in the message box.

Frequently asked questions

What is CVE-2021-3279?: sz.chat version 4 allows injection of web scripts and HTML in the message box.
How severe is CVE-2021-3279?: CVE-2021-3279 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-3279 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3279?: CVE-2021-3279 affects Fortics Szchat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3279?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3279 published?: CVE-2021-3279 was published on 2021-07-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fortics:szchat:4:*:*:*:*:*:*:*

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