CVE-2009-1030

WordPress MU < 2.7 - Cross-Site Scripting via HTTP Host Header

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-1030. PoCs published by Juan Galiana Lara.

AI-analyzed exploit summary This exploit demonstrates a Cross-Site Scripting (XSS) vulnerability in WordPress MU < 2.7 due to improper sanitization of the HTTP Host header. The PoC shows how an attacker can inject malicious JavaScript via the Host header, which executes in the victim's browser context.

Description

Cross-site scripting (XSS) vulnerability in the choose_primary_blog function in wp-includes/wpmu-functions.php in WordPress MU (WPMU) before 2.7 allows remote attackers to inject arbitrary web script or HTML via the HTTP Host header.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Juan Galiana Lara · textwebappsphp
https://www.exploit-db.com/exploits/8196

This exploit demonstrates a Cross-Site Scripting (XSS) vulnerability in WordPress MU < 2.7 due to improper sanitization of the HTTP Host header. The PoC shows how an attacker can inject malicious JavaScript via the Host header, which executes in the victim's browser context.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: WordPress MU < 2.7
Auth required
Prerequisites: Access to send crafted HTTP requests to the target server · Victim must visit a crafted URL or page
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (6)

Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/34075
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1021838
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/49184
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/501667/100/0/threaded
Mailing List vendor-advisory x_refsource_hp
http://marc.info/?l=bugtraq&m=126996727024732&w=2
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/8196

Scores

EPSS 0.0466
EPSS Percentile 90.6%

Details

CWE
CWE-79
Status published
Products (21)
wordpress/wordpress_mu 1.0 (5 CPE variants)
wordpress/wordpress_mu 1.1
wordpress/wordpress_mu 1.1.1
wordpress/wordpress_mu 1.2
wordpress/wordpress_mu 1.2.1
wordpress/wordpress_mu 1.2.2
wordpress/wordpress_mu 1.2.3
wordpress/wordpress_mu 1.2.4 (2 CPE variants)
wordpress/wordpress_mu 1.2.5a
wordpress/wordpress_mu 1.3
... and 11 more
Published Mar 20, 2009
Tracked Since Feb 18, 2026