CVE-2022-1990

Nested Pages <= 3.1.20 - Stored Cross-Site Scripting

2022-06-06 00:00

Strategic Overview

Status: Patched in 3.1.21
Affected Plugin: Nested Pages
Affected Version: < 3.1.21
CVSS: 4.8Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2022-1990

At a glance

CVE-2022-1990 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Nested Pages WordPress plugin, affecting versions < 3.1.21. It carries a CVSS score of 4.8 (reachable over the network; low attack complexity). The issue is fixed in version 3.1.21; sites on affected versions should update now. Disclosed June 2022, reported by Sachin Bahl.

Vulnerability Overview

The Nested Pages WordPress plugin before 3.1.21 does not escape and sanitize the some of its settings, which could allow high privilege users to perform Stored Cross-Site Scripting attacks when the unfiltered_html 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.

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

Reaching this weakness in Nested Pages < 3.1.21 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 Nested Pages the fix is 3.1.21: builds < 3.1.21 are affected, anything from 3.1.21 onward is not.

Remediation

Update to version 3.1.21, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Nested Pages: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Nested Pages 3.1.21 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-1990 https://www.wordfence.com/threat-intel/vulnerabilities/id/4dcc6225-b47a-4184-a2f3-1292e5abe1bd https://nvd.nist.gov/vuln/detail/CVE-2022-1990

Related records

Same weakness class

Other vulnerabilities in Nested Pages

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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