CVE-2021-24665

WP Video Lightbox <= 1.9.2 - Contributor+ Stored Cross-Site Scripting

2021-08-23 00:00

Strategic Overview

Status: Patched in 1.9.3
Affected Plugin: WP Video Lightbox
Affected Version: <= 1.9.2
CVSS: 5.4Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2021-24665

View all WP Video Lightbox vulnerabilities

At a glance

CVE-2021-24665 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WP Video Lightbox WordPress plugin, affecting versions <= 1.9.2. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.9.3; sites on affected versions should update now. Disclosed August 2021, reported by Vishnupriya Ilango.

Vulnerability Overview

The WP Video Lightbox WordPress plugin before 1.9.3 does not escape the attributes of its shortcodes, allowing users with a role as low as contributor to perform Cross-Site Scripting attacks

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 WP Video Lightbox <= 1.9.2 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 WP Video Lightbox the fix is 1.9.3: builds <= 1.9.2 are affected, anything from 1.9.3 onward is not.

Remediation

Update to version 1.9.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WP Video Lightbox: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WP Video Lightbox 1.9.3 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24665 https://www.wordfence.com/threat-intel/vulnerabilities/id/e4a2c3cf-0785-4bf0-9ad8-0d2479545067 https://nvd.nist.gov/vuln/detail/CVE-2021-24665

Related records

Same weakness class

CVSS Vector

5.4

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

Base

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

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