How severe is CVE-2021-34620?

CVE-2021-34620 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-34620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34620?

CVE-2021-34620 affects Fluentforms Contact Form. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34620?

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

When was CVE-2021-34620 published?

CVE-2021-34620 was published on 2021-07-07 and last updated on 2026-06-17.

CVE-2021-34620

CVE-2021-34620 is a high-severity vulnerability in Fluentforms Contact Form with a CVSS 3.x base score of 8.8. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Fluentforms Contact Form
Published: 2021-07-07
Last modified: 2026-06-17

Description

The WP Fluent Forms plugin < 3.6.67 for WordPress is vulnerable to Cross-Site Request Forgery leading to stored Cross-Site Scripting and limited Privilege Escalation due to a missing nonce check in the access control function for administrative AJAX actions

Frequently asked questions

What is CVE-2021-34620?: The WP Fluent Forms plugin < 3.6.67 for WordPress is vulnerable to Cross-Site Request Forgery leading to stored Cross-Site Scripting and limited Privilege Escalation due to a missing nonce check in the access control function for administrative AJAX actions
How severe is CVE-2021-34620?: CVE-2021-34620 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-34620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34620?: CVE-2021-34620 affects Fluentforms Contact Form. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34620?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-34620 published?: CVE-2021-34620 was published on 2021-07-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fluentforms:contact_form:*:*:*:*:*:*:*:*

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