Paid Memberships Pro
CVE-2021-24979
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
The Paid Memberships Pro WordPress plugin before 2.6.6 does not escape the s parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. The Paid Memberships Pro WordPress plugin before 2.6.6 does not escape the s parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting Affected products include: Strangerstudios Paid Memberships Pro. Version information: before 2.6.6.
Know when Paid Memberships Pro gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
The Paid Memberships Pro WordPress plugin before 2.6.6 does not escape the s parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)NVD
More in Paid Memberships Pro
View allDirectory traversal vulnerability in services/getfile.php in the Paid Memberships Pro plugin before 1.7.15 for WordPress
The Paid Memberships Pro WordPress Plugin, version < 2.9.8, is affected by an unauthenticated SQL injection vulnerabilit
The Paid Memberships Pro WordPress plugin before 2.9.12 does not prevent subscribers from rendering shortcodes that conc
The Paid Memberships Pro plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type vali
The pmpro-member-directory WordPress plugin before 1.2.6 does not prevent users with at least the contributor role from
Multiple cross-site scripting (XSS) vulnerabilities in the Paid Memberships Pro (PMPro) plugin before 1.8.4.3 for WordPr
Authorization Bypass Through User-Controlled Key vulnerability in Paid Memberships Pro allows Accessing Functionality No
The pmpro-membership-maps WordPress plugin before 0.7 does not prevent users with at least the contributor role from lea
SQL injection vulnerability in the Paid Memberships Pro versions prior to 2.5.6 allows remote authenticated attackers to
The Paid Memberships Pro plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and includi
The Paid Memberships Pro WordPress plugin before 2.12.9 does not prevent user with at least the contributor role from le
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Paid Memberships P
GitHub PoC
Exploit-DB