CVE-2019-9978KEV · OVERDUE

WordPress Social Warfare Plugin Cross-Site Scripting (XSS) Vulnerability

Medium · published March 24, 2019

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 6.1. It is confirmed in active exploitation. It sits in the 99.5th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
6.1
EPSS
73%
Percentile
99.5
In the wild
Confirmed
What it is

⚠️ An XSS vulnerability in the Social Warfare plugin can lead to a crafty surprise for users on your WordPress site! This flaw lurks in the `swp_url` parameter and has been seen in real-world attacks. 🔍 Think of it like a restaurant where a customer can slip a note into an order without any checks — if the chef doesn’t read it, they might serve up something dangerous! An attacker could exploit this vulnerability to inject malicious scripts, allowing them to steal sensitive user data or hijack sessions. This could lead to unauthorized actions on behalf of your users, compromising their trust and your site's integrity.

Put simply

Think of it like a restaurant where a customer can slip a note into an order without any checks — if the chef doesn’t read it, they might serve up something dangerous! This stored XSS vulnerability occurs when the `swp_url` parameter is not properly sanitized, allowing attackers to store and execute malicious JavaScript code when accessed by administrative users.

What to do

An attacker could exploit this vulnerability to inject malicious scripts, allowing them to steal sensitive user data or hijack sessions. This could lead to unauthorized actions on behalf of your users, compromising their trust and your site's integrity. Update the Social Warfare plugin to version 3.5.3 or later immediately. Review your site's input handling and ensure proper sanitization of all user-supplied data. Consider implementing a Content Security Policy to limit script execution. You’ve got this! Patch up your site and keep your users safe! 🛡️

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.72946 · 99.5th percentile
Published
2019-03-24T14:47Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 24 MAR 14:47Z
    The social-warfare plugin before 3.5.3 for WordPress has stored XSS via the wp-admin/admin-post.php?swp_debug=load_options swp_url parameter, as exploited in…
    cvelistv5