CVE-2022-2940

Feed Them Social – for Twitter feed, Youtube and more <= 2.9.9 - Authenticated (Subscriber+) Stored Cross-Site Scripting

2022-11-14 00:00
Marco Wotschka

Strategic Overview

Status
Patched in 3.0.1
Affected Plugin
Feed Them Social – Social Media Feeds, Video, and Photo Galleries
Affected Version
<= 2.9.9
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2022-2940
View all Feed Them Social – Social Media Feeds, Video, and Photo Galleries vulnerabilities

At a glance

CVE-2022-2940 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Feed Them Social WordPress plugin, affecting versions <= 2.9.9. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 3.0.1; sites on affected versions should update now. Disclosed November 2022, reported by Marco Wotschka.

Vulnerability Overview

The Feed Them Social plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘access_token’ parameter in the function fts_instagram_token_ajax in versions up to, and including, 2.9.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, subscriber and above, to inject arbitrary web scripts stored in the plugin options.

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')

Feed Them Social <= 2.9.9 carries this weakness at access_token, and reaching it takes an account at Subscriber level or above. 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 Feed Them Social the fix is 3.0.1: builds <= 2.9.9 are affected, anything from 3.0.1 onward is not.

Remediation

Update to version 3.0.1, or a newer patched version

How does WordSec protect against this?

An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Feed Them Social 3.0.1 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-2940https://www.wordfence.com/threat-intel/vulnerabilities/id/1d07eefc-f406-4da4-addb-559caa6dc208https://nvd.nist.gov/vuln/detail/CVE-2022-2940

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C