Stored Cross-Site Scripting in WP Symposium Pro by WordPress
CVE-2021-47927

5.1MEDIUM

Key Information:

Vendor

WordPress
Status
WP Symposium Pro
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47927?

WP Symposium Pro version 2021.10 is vulnerable to a stored cross-site scripting attack due to inadequate sanitization of user inputs, specifically in the forum name parameter. This flaw allows authenticated users to inject malicious JavaScript payloads via POST requests to the admin setup page, particularly within the wps_admin_forum_add_name parameter. As a result, any user accessing the compromised forum could unknowingly execute the embedded scripts, leading to various malicious outcomes such as data theft or unauthorized actions within the application.

Affected Version(s)

WP Symposium Pro 2021.10

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47927 - Proof of Concept

References

https://www.exploit-db.com/exploits/50514
exploit
http://www.wpsymposiumpro.com/
product
https://wordpress.org/plugins/wp-symposium-pro/
product

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Murat DEMIRCI (@butterflyhunt3r)
.