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Vulnerability record · CVE-2009-1030 · published 20 March 2009

CVE-2009-1030: Wordpress mu cross-site scripting vulnerability

Wordpress · Wordpress Mu

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.

4.3 CVSS 2.0 Medium EPSS 4.7% · top 8.6% CWE-79 · Cross-site scripting
4.3CVSS 2.0 base score
4.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=126996727024732&w=2
http://www.securityfocus.com/archive/1/501667/100/0/threaded
http://www.securityfocus.com/bid/34075
http://www.securitytracker.com/id?1021838
https://exchange.xforce.ibmcloud.com/vulnerabilities/49184
https://www.exploit-db.com/exploits/8196
http://marc.info/?l=bugtraq&m=126996727024732&w=2
http://www.securityfocus.com/archive/1/501667/100/0/threaded
http://www.securityfocus.com/bid/34075
http://www.securitytracker.com/id?1021838
https://exchange.xforce.ibmcloud.com/vulnerabilities/49184
https://www.exploit-db.com/exploits/8196

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-1030), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.