CVE-2023-41134

Antispam Bee <= 2.11.3 - IP Address Spoofing via get_client_ip

2023-11-27 00:00

Strategic Overview

Status: Patched in 2.11.4
Affected Plugin: Antispam Bee
Affected Version: <= 2.11.3
CVSS: 5.3Medium
Weakness type: CWE-807 · Reliance on Untrusted Inputs in a Security Decision
CVE: CVE-2023-41134

At a glance

CVE-2023-41134 is a medium-severity Reliance on Untrusted Inputs in a Security Decision vulnerability in the Antispam Bee WordPress plugin, affecting versions <= 2.11.3. 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 2.11.4; sites on affected versions should update now. Disclosed November 2023, reported by Kévin Mosbahi (Mika).

Vulnerability Overview

The Antispam Bee plugin for WordPress is vulnerable to IP Address Spoofing in all versions up to, and including, 2.11.3 due to use of user-supplied HTTP headers as a primary method for IP retrieval. This makes it possible for unauthenticated attackers to bypass country blocking.

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-807: Reliance on Untrusted Inputs in a Security Decision

The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.

Remediation

Update to version 2.11.4, or a newer patched version

How does WordSec protect against this?

The fix is the thing that ends this: Antispam Bee 2.11.4 closes this, and updating the plugin is the step that ends it.

Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-41134 https://www.wordfence.com/threat-intel/vulnerabilities/id/fb102891-b4a8-4089-b70c-43866ad85b7b https://nvd.nist.gov/vuln/detail/CVE-2023-41134

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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