CVE-2021-25096

IP2Location Country Blocker <= 2.26.4 - Ban Bypass

2022-01-06 00:00

Strategic Overview

Status: Patched in 2.26.5
Affected Plugin: IP2Location Country Blocker
Affected Version: <= 2.26.4
CVSS: 5.3Medium
Weakness type: CWE-639 · Authorization Bypass Through User-Controlled Key
CVE: CVE-2021-25096

View all IP2Location Country Blocker vulnerabilities

At a glance

CVE-2021-25096 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the IP2Location Country Blocker WordPress plugin, affecting versions <= 2.26.4. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.26.5; sites on affected versions should update now. Disclosed January 2022.

Vulnerability Overview

The IP2Location Country Blocker WordPress plugin before 2.26.5 bans can be bypassed by using a specific parameter in the URL

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 privileges on the target site, and no interaction from a victim user.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in IP2Location Country Blocker <= 2.26.4 takes a caller who can reach the endpoint. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For IP2Location Country Blocker the fix is 2.26.5: builds <= 2.26.4 are affected, anything from 2.26.5 onward is not.

Remediation

Update to version 2.26.5, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: IP2Location Country Blocker 2.26.5 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-25096 https://www.wordfence.com/threat-intel/vulnerabilities/id/0b8d337b-2d2c-4769-9ac0-6e22ba39a42f https://nvd.nist.gov/vuln/detail/CVE-2021-25096

Related records

Other vulnerabilities in IP2Location Country Blocker

CVSS Vector

5.3

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityNone

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