Joomla! vulnerable to Cross-site Scripting

published 2011-07-27 15 y ago modified 2026-06-16 4 mo ago also GHSA-vcq7-x4wr-w2mj , EUVD-2011-2494

cvss: 4.3; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.6.4 allow remote attackers to inject arbitrary web script or HTML via (1) the query string to the com_contact component, as demonstrated by the Itemid parameter to index.php; (2) the query string to the com_content component, as demonstrated by the filter_order parameter to index.php; (3) the query string to the com_newsfeeds component, as demonstrated by an arbitrary parameter to index.php; or (4) the option parameter in a reset.request action to index.php; and, when Internet Explorer or Konqueror is used, (5) allow remote attackers to inject arbitrary web script or HTML via the searchword parameter in a search action to index.php in the com_search component.

Patch / fix

fixed in 1

packagist joomla/joomla-cms 1.6.4

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

openwall.com http://www.openwall.com/lists/oss-security/2011/06/28/4 referenced PoC, tagged "exploit" by a source, unverified
openwall.com http://www.openwall.com/lists/oss-security/2011/06/29/12 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	joomla/joomla-cms	<1.6.4	1.6.4

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

openwall.com /lists/oss-security/2011/06/28/4
mailing-list, web, exploit
openwall.com /lists/oss-security/2011/06/29/12
mailing-list, web, exploit
yehg.net /lab/pr0js/advisories/joomla/core/%5Bjoomla_1.6.3%5D_cross_site_scripting%28XSS%29
web
developer.joomla.org /security/news/352-20110604-xss-vulnerability.html
web
nvd.nist.gov /vuln/detail/CVE-2011-2509
advisory

Sources

CVE List CVE-2011-2509
GitHub Advisory GHSA-vcq7-x4wr-w2mj
NVD CVE-2011-2509

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary