9.8

CVE-2023-1405: strategy11 formidable_forms Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalModified
Published 16-01-2024Last modified 11-06-2025
Open JSON

Vulnerability summary

CVE-2023-1405 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in strategy11 formidable_forms. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (wordfence)
EPSS score
0.70%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 16-01-2024
    PublishedVulnerability first disclosed.
  2. 11-06-2025
    Last modifiedVulnerability information updated.

Description

The Formidable Forms WordPress plugin before 6.2 unserializes user input, which could allow anonymous users to perform PHP Object Injection when a suitable gadget is present.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

0.00 pp

From 0.70% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.70%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Strategy111 product
Unknown1 product
Wordpress1 product
  • formidable≤ 6.1.2 (fixed in 6.2)

3 vendors · 3 products

References

2 links