CVE-2021-24343

iFlyChat – WordPress Chat <= 4.6.4 - Admin+ Stored Cross-Site Scripting

2021-05-24 00:00

Strategic Overview

Status: Patched in 4.7.0
Affected Plugin: iFlyChat – WordPress Chat
Affected Version: < 4.7.0
CVSS: 4.8Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24343

View all iFlyChat – WordPress Chat vulnerabilities

At a glance

CVE-2021-24343 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the iFlyChat WordPress plugin, affecting versions < 4.7.0. It carries a CVSS score of 4.8 (reachable over the network; low attack complexity). The issue is fixed in version 4.7.0; sites on affected versions should update now. Disclosed May 2021, reported by Kishore Hariram.

Vulnerability Overview

The iFlyChat WordPress plugin before 4.7.0 does not sanitise its APP ID setting before outputting it back in the page, leading to an authenticated Stored Cross-Site Scripting issue

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.

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

Reaching this weakness in iFlyChat < 4.7.0 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 iFlyChat the fix is 4.7.0: builds < 4.7.0 are affected, anything from 4.7.0 onward is not.

Remediation

Update to version 4.7.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to iFlyChat: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: iFlyChat 4.7.0 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24343 https://www.wordfence.com/threat-intel/vulnerabilities/id/81141b8c-9677-4267-9026-33267e3135f5 https://nvd.nist.gov/vuln/detail/CVE-2021-24343

Related records

Same weakness class

6.4CVE-2024-31108: iFlyChat – WordPress Chat <= 4.7.2 Stored XSSCVE-2024-31108

CVSS Vector

4.8

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

Base

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

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