CVE-2021-24794

Connections Business Directory <= 10.4.2 - Admin+ Stored Cross-Site Scripting

2021-09-28 00:00

Strategic Overview

Status: Patched in 10.4.3
Affected Plugin: Connections Business Directory
Affected Version: < 10.4.3
CVSS: 5.5Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24794

View all Connections Business Directory vulnerabilities

At a glance

CVE-2021-24794 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Connections Business Directory WordPress plugin, affecting versions < 10.4.3. It carries a CVSS score of 5.5 (reachable over the network; low attack complexity). The issue is fixed in version 10.4.3; sites on affected versions should update now. Disclosed September 2021, reported by Huy Nguyen.

Vulnerability Overview

The Connections Business Directory WordPress plugin before 10.4.3 does not escape the Address settings when creating an Entry, which could allow high privilege users to perform Cross-Site Scripting when the unfiltered_html capability is disallowed.

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.

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

Reaching this weakness in Connections Business Directory < 10.4.3 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 Connections Business Directory the fix is 10.4.3: builds < 10.4.3 are affected, anything from 10.4.3 onward is not.

Remediation

Update to version 10.4.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Connections Business Directory: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Connections Business Directory 10.4.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24794 https://www.wordfence.com/threat-intel/vulnerabilities/id/3b0d6b1f-5601-4c96-893c-e296511a2996 https://nvd.nist.gov/vuln/detail/CVE-2021-24794

Related records

Same weakness class

Other vulnerabilities in Connections Business Directory

CVSS Vector

5.5

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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