CVE-2011-2509

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

1.1% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2011-07-27 20:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:31 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.1% in the next 30 days (EPSS).
• Severity: 4.3 MEDIUM (CVSS).
• Fix: none linked yet, which raises it.

Details

Published

2011-07-27 20:55 UTC

Last modified

2026-06-16 23:31 UTC

Exploit probability

1.1% · EPSS, next 30 days

Weakness

CWE-79 · Cross-site scripting

Record status

Modified

Affected

• Joomla joomla\! ≤ 1.6.3
• Joomla joomla\! 1.5.0
• Joomla joomla\! 1.5.1
• Joomla joomla\! 1.5.2
• Joomla joomla\! 1.5.3
• Joomla joomla\! 1.5.4
• Joomla joomla\! 1.5.5
• Joomla joomla\! 1.5.6

Attack profile CVSS 2.0 · 4.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-2509.md and follow it. Check whether this project is affected by CVE-2011-2509. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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