CVE-2023-0816: strategy11 formidable_form_builder Authentication Bypass by Spoofing
CVSS: 6.5v3.1MediumModified
Published 27-03-2023Last modified 19-02-2025
Vulnerability summary
CVE-2023-0816 is a medium (CVSS 6.5) Authentication Bypass by Spoofing vulnerability in strategy11 formidable_form_builder. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 41.4% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.50%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 27-03-2023PublishedVulnerability first disclosed.
- 19-02-2025Last modifiedVulnerability information updated.
Description
The Formidable Forms WordPress plugin before 6.1 uses several potentially untrusted headers to determine the IP address of the client, leading to IP Address spoofing and bypass of anti-spam protections.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NSources3 sources · 5.3–6.5
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- wordfenceSource5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NDiffers
EPSS trend
Probability
0.50%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
0.00 pp
From 0.50% on 20-09-2026
20-09-202620-10-2026
EPSS score0.50%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-290Authentication Bypass by SpoofingThis attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
- CWE-807Reliance on Untrusted Inputs in a Security DecisionThe product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.
Affected systems
Strategy111 product
Unknown1 product
- formidable forms< 6.1
Wordpress1 product
- formidable≤ 6.0.1 (fixed in 6.1)
3 vendors · 3 products
References
2 links- wpscan.com/vulnerability/a281f63f-e295-4666-8a08-01b23cd5a744ExploitVDB EntryTechnical DescriptionThird Party Advisory