How severe is CVE-2021-3346?

CVE-2021-3346 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3346?

CVE-2021-3346 affects Nic Foris. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3346?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-3346 published?

CVE-2021-3346 was published on 2021-01-29 and last updated on 2026-06-17.

CVE-2021-3346

CVE-2021-3346 is a critical-severity vulnerability in Nic Foris with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nic Foris
Published: 2021-01-29
Last modified: 2026-06-17

Description

Foris before 101.1.1, as used in Turris OS, lacks certain HTML escaping in the login template.

Frequently asked questions

What is CVE-2021-3346?: Foris before 101.1.1, as used in Turris OS, lacks certain HTML escaping in the login template.
How severe is CVE-2021-3346?: CVE-2021-3346 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3346?: CVE-2021-3346 affects Nic Foris. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3346 published?: CVE-2021-3346 was published on 2021-01-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nic:foris:*:*:*:*:*:*:*:*