CVE-2020-8799

WTI Like Post <= 1.4.5 - Stored Cross-Site Scripting

2020-05-02 00:00

Strategic Overview

Status: Patched in 1.4.6
Affected Plugin: WTI Like Post
Affected Version: < 1.4.6
CVSS: 5.5Medium
Weakness type: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE: CVE-2020-8799

At a glance

CVE-2020-8799 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the WTI Like Post WordPress plugin, affecting versions < 1.4.6. It carries a CVSS score of 5.5 (reachable over the network; low attack complexity). The issue is fixed in version 1.4.6; sites on affected versions should update now. Disclosed May 2020, reported by Davide Bernardi.

Vulnerability Overview

A Stored XSS vulnerability has been found in the administration page of the WTI Like Post plugin through 1.4.5 for WordPress. Once the administrator has submitted the data, the script stored is executed for all the users visiting the website.

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 WTI Like Post < 1.4.6 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 WTI Like Post the fix is 1.4.6: builds < 1.4.6 are affected, anything from 1.4.6 onward is not.

Remediation

Update to version 1.4.6, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to WTI Like Post: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: WTI Like Post 1.4.6 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2020-8799 https://www.wordfence.com/threat-intel/vulnerabilities/id/21dd21cb-35b7-47df-a9f0-6fd92c45a8ce https://nvd.nist.gov/vuln/detail/CVE-2020-8799

Related records

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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