CVE-2023-29101

Betheme <= 26.7.5 - Reflected Cross-Site Scripting

2023-04-13 00:00

Strategic Overview

Status: Patched in 26.8
Affected Theme: Betheme
Affected Version: <= 26.7.5
CVSS: 6.1Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2023-29101

At a glance

CVE-2023-29101 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Betheme WordPress theme, affecting versions <= 26.7.5. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 26.8; sites on affected versions should update now. Disclosed April 2023, reported by Rafie Muhammad.

Vulnerability Overview

The Betheme theme for WordPress is vulnerable to Reflected Cross-Site Scripting on shop pages in versions up to, and including, 26.7.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

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.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Betheme <= 26.7.5 takes a caller who can reach the endpoint. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Betheme the fix is 26.8: builds <= 26.7.5 are affected, anything from 26.8 onward is not.

Remediation

Update to version 26.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Betheme: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Betheme 26.8 closes this, and updating the theme is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-29101 https://www.wordfence.com/threat-intel/vulnerabilities/id/c14b948f-129d-4223-b3ee-0bef1f9fc703 https://nvd.nist.gov/vuln/detail/CVE-2023-29101

Related records

Same weakness class

Other vulnerabilities in Betheme

CVSS Vector

6.1

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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