What is the CVSS score of CVE-2021-24406?

CVE-2021-24406 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 3.4%.

Is there a public PoC exploit available for CVE-2021-24406?

Yes, a public proof-of-concept exploit is available for CVE-2021-24406. Prioritise patching immediately. EPSS: 3.4%.

Wpforo Forum CVE-2021-24406

MEDIUM

URL Redirection to Untrusted Site (Open Redirect) (CWE-601)

2021-07-06 contact@wpscan.com

WordPress Open Redirect Wpforo Forum Gvectors

6.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-601 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V3 - Web Frontend Security Redirect URL validation MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could redirect users to malicious websites via URL manipulation by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 3.4% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

The wpForo Forum WordPress plugin before 1.9.7 did not validate the redirect_to parameter in the login form of the forum, leading to an open redirect issue after a successful login. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate redirect destinations against an allowlist, avoid using user input in redirect URLs.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Open Redirect (CWE-601), which allows attackers to redirect users to malicious websites via URL manipulation. The wpForo Forum WordPress plugin before 1.9.7 did not validate the redirect_to parameter in the login form of the forum, leading to an open redirect issue after a successful login. Such issue could allow an attacker to induce a user to use a login URL redirecting to a website under their control and being a replica of the legitimate one, asking them to re-enter their credentials (which will then in the attacker hands) Affected products include: Gvectors Wpforo Forum. Version information: before 1.9.7.

Know when Wpforo Forum gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

The wpForo Forum WordPress plugin before 1.9.7 did not validate the redirect_to parameter in the login form of the forum, leading to an open redirect issue after a successful login. Such issue could allow an attacker to induce a user to use a login URL redirecting to a website under their control and being a replica of the legitimate one, asking them to re-enter their credentials (which will then in the attacker hands)

Threat Intelligence Overview

EPSS Score

3.4%

Top 13% exploitable

Exploit

POC

Public exploit code exists

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS POC (1)

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC Yes

EPSS 3.4%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +3

CVSS: +30

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Affected Products (CPE)NVD

cpe:2.3:a:gvectors:wpforo_forum:*:*:*:*:*:wordpress:*:*

More in Wpforo Forum

View all

CVE-2023-2249 HIGH Act Now

8.8 Jun 09

The wpForo Forum plugin for WordPress is vulnerable to Local File Include, Server-Side Request Forgery, and PHAR Deseria

CVE-2026-80513 HIGH This Week POC

7.5 Sep 24

PHP object injection in the wpForo Forum WordPress plugin before 3.1.6 lets an authenticated attacker with Subscriber-le

CVE-2024-3200 CRITICAL Act Now

9.9 Jun 01

The wpForo Forum plugin for WordPress is vulnerable to SQL Injection via the 'slug' attribute of the 'wpforo' shortcode

CVE-2023-2309 MEDIUM This Month POC

6.1 Jul 24

The wpForo Forum WordPress plugin before 2.1.9 does not escape some request parameters while in debug mode, leading to a

CVE-2018-11709 MEDIUM This Month POC

6.1 Jun 04

wpforo_get_request_uri in wpf-includes/functions.php in the wpForo Forum plugin before 1.4.12 for WordPress allows Unaut

CVE-2026-49767 CRITICAL Act Now

9.8 Jun 17

Authentication bypass in the wpForo Forum WordPress plugin versions 3.1.0 and earlier allows remote unauthenticated atta

CVE-2026-49769 CRITICAL Act Now

9.8 Jun 15

Unauthenticated PHP Object Injection in the wpForo Forum WordPress plugin versions 3.1.0 and earlier allows remote attac

CVE-2026-12696 MEDIUM This Month POC

5.4 Aug 01

Stored cross-site scripting in wpForo Forum WordPress plugin before 3.1.2 allows a subscriber-level authenticated user t

CVE-2026-12697 MEDIUM This Month POC

5.4 Jul 31

Insecure Direct Object Reference (IDOR) in the wpForo Forum WordPress plugin before 3.1.2 allows any subscriber-level au

CVE-2026-40798 CRITICAL Act Now

9.3 Jun 15

Unauthenticated SQL injection in the wpForo Forum WordPress plugin (versions 3.0.4 and earlier) allows remote attackers

CVE-2026-80514 MEDIUM This Month POC

5.3 Sep 25

Rate-limit bypass in the wpForo Forum WordPress plugin (3.0.0 up to but not including 3.1.6) allows unauthenticated remo

CVE-2026-3666 HIGH This Week

8.8 Apr 04

Arbitrary file deletion in wpForo Forum WordPress plugin versions ≤2.4.16 allows authenticated attackers with subscriber

Same weakness CWE-601 – URL Redirection to Untrusted Site (Open Redirect)

View all

CVE-2017-1000117 HIGH POC

8.8

CVE-2016-5385 HIGH POC

8.1

CVE-2018-11784 MEDIUM POC

4.3

CVE-2017-3528 MEDIUM POC

5.4

CVE-2012-0518 MEDIUM

4.7

CVE-2024-21641 MEDIUM POC

6.5

CVE-2015-5354 MEDIUM POC

5.8

CVE-2024-22891 CRITICAL POC

9.8

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back