CVE-2021-24847

SEO Redirection <= 8.1 - Subscriber+ SQL Injection

2021-10-18 00:00

Strategic Overview

Status: Patched in 8.2
Affected Plugin: SEO Redirection Plugin – 301 Redirect Manager
Affected Version: <= 8.1
CVSS: 8.8High
Weakness type: CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE: CVE-2021-24847

View all SEO Redirection Plugin – 301 Redirect Manager vulnerabilities

At a glance

CVE-2021-24847 is a high-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the SEO Redirection Plugin WordPress plugin, affecting versions <= 8.1. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). The issue is fixed in version 8.2; sites on affected versions should update now. Disclosed October 2021, reported by ZhongFu Su.

Vulnerability Overview

The importFromRedirection AJAX action of the SEO Redirection Plugin – 301 Redirect Manager WordPress plugin before 8.2, available to any authenticated user, does not properly sanitise the offset parameter before using it in a SQL statement, leading an SQL injection when the redirection plugin is also installed

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality, integrity, availability — full site compromise territory.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Reaching this weakness in SEO Redirection Plugin <= 8.1 takes a caller who can reach the endpoint. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For SEO Redirection Plugin the fix is 8.2: builds <= 8.1 are affected, anything from 8.2 onward is not.

Remediation

Update to version 8.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to SEO Redirection Plugin: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: SEO Redirection Plugin 8.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24847 https://www.wordfence.com/threat-intel/vulnerabilities/id/20033eb0-512f-48ea-8ef7-e22701a2c5d7 https://nvd.nist.gov/vuln/detail/CVE-2021-24847

Related records

Other vulnerabilities in SEO Redirection Plugin – 301 Redirect Manager

CVSS Vector

8.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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