How severe is CVE-2019-15780?

CVE-2019-15780 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-2019-15780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15780?

CVE-2019-15780 affects Strategy11 Formidable Form Builder. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15780?

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-2019-15780 published?

CVE-2019-15780 was published on 2019-08-29 and last updated on 2026-06-17.

CVE-2019-15780

CVE-2019-15780 is a critical-severity vulnerability in Strategy11 Formidable Form Builder 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. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Strategy11 Formidable Form Builder
Published: 2019-08-29
Last modified: 2026-06-17

Description

The formidable plugin before 4.02.01 for WordPress has unsafe deserialization.

Frequently asked questions

What is CVE-2019-15780?: The formidable plugin before 4.02.01 for WordPress has unsafe deserialization.
How severe is CVE-2019-15780?: CVE-2019-15780 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-2019-15780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15780?: CVE-2019-15780 affects Strategy11 Formidable Form Builder. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15780?: 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-2019-15780 published?: CVE-2019-15780 was published on 2019-08-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:strategy11:formidable_form_builder:*:*:*:*:*:wordpress:*:*

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