CVE-2021-25095

IP2Location Country Blocker <= 2.26.4 - Subscriber+ Arbitrary Country Ban

2022-01-06 00:00

Strategic Overview

Status: Patched in 2.26.5
Affected Plugin: IP2Location Country Blocker
Affected Version: <= 2.26.4
CVSS: 7.1High
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2021-25095

View all IP2Location Country Blocker vulnerabilities

At a glance

CVE-2021-25095 is a high-severity Missing Authorization vulnerability in the IP2Location Country Blocker WordPress plugin, affecting versions <= 2.26.4. It carries a CVSS score of 7.1 (reachable over the network; low attack complexity; high availability impact). The issue is fixed in version 2.26.5; sites on affected versions should update now. Disclosed January 2022, reported by Krzysztof Zając.

Vulnerability Overview

The IP2Location Country Blocker WordPress plugin before 2.26.5 does not have authorisation and CSRF checks in the ip2location_country_blocker_save_rules AJAX action, allowing any authenticated users, such as subscriber to call it and block arbitrary country, or block all of them at once, preventing users from accessing the frontend.

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 availability.

CWE-862: Missing Authorization

Reaching this weakness in IP2Location Country Blocker <= 2.26.4 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. 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-2021-25095 https://www.wordfence.com/threat-intel/vulnerabilities/id/736e51d4-da1d-4252-a10f-d89eb6a68de4 https://nvd.nist.gov/vuln/detail/CVE-2021-25095

Related records

Other vulnerabilities in IP2Location Country Blocker

CVSS Vector

7.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityHigh

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