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CVE-2021-24166

18
FAUCET Score

CVE-2021-24166 describes a missing nonce protection vulnerability in the Ninja Forms WordPress plugin versions prior to 3.4.34. This flaw allows an unauthenticated attacker to craft a request to disconnect a site's OAuth connection, leading to a loss of availability and integrity for integrated services. Rated Medium severity (CVSS 5.4), the attack requires user interaction (UI:R) but has low attack complexity (AC:L). There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.4.34CPE matchmatch criteria
cpe:2.3:a:ninjaforms:ninja_forms:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 39th percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

wpscan.com / vulnerability/b531fb65-a8ff-4150-a9a1-2a62a3c00bd6
ExploitThird Party Advisory
wordfence.com / blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms
Third Party Advisory