HOMEVULNERABILITIESCVE-2021-24165
MEDIUM

CVE-2021-24165

CWE-601Published: April 5, 2021· Updated: Jun 17, 2026

6.1
CVSS v3.1

Official Description

In the Ninja Forms Contact Form WordPress plugin before 3.4.34, the wp_ajax_nf_oauth_connect AJAX action was vulnerable to open redirect due to the use of a user supplied redirect parameter and no protection in place.

NVD Source

Technical Analysis

CVE-2021-24165 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeChanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Vendors & Products

ninjaforms1 product(s)
ninja forms
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://wpscan.com/vulnerability/6147acf5-e43f-47e6-ab56-c9c8be584818
ADVISORYhttps://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/
ADVISORYhttps://wpscan.com/vulnerability/6147acf5-e43f-47e6-ab56-c9c8be584818
ADVISORYhttps://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/

All References (4)

→
https://wpscan.com/vulnerability/6147acf5-e43f-47e6-ab56-c9c8be584818Exploit · Third Party Advisory
→
https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/Third Party Advisory
→
https://wpscan.com/vulnerability/6147acf5-e43f-47e6-ab56-c9c8be584818Exploit · Third Party Advisory
→
https://www.wordfence.com/blog/2021/02/one-million-sites-affected-four-severe-vulnerabilities-patched-in-ninja-forms/Third Party Advisory

Quick Facts

CVE IDCVE-2021-24165
CVSS Score6.1 / 10
SeverityMEDIUM
WeaknessCWE-601
CISA KEVNo
Affected1 vendor(s)
PublishedApr 5, 2021

Related CVEs (CWE-601)

CVE-2024-22891
9.8
CVE-2020-36912
9.8
CVE-2019-25282
9.8
CVE-2025-55031
9.8
CVE-2025-43526
9.8
CVE-2022-31657
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-24165 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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