What’s Vulnerable › Vulnerabilities

CVE-2011-4290

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-07-16 · updated 2026-06-16
• Weakness: CWE-79

Description

Multiple cross-site scripting (XSS) vulnerabilities in lib/weblib.php in Moodle 1.9.x before 1.9.12 allow remote attackers to inject arbitrary web script or HTML via vectors related to URL encoding.

Affected products

• Moodle: 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6 (+5)

References

• http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=5a3010310bff0b3946804a72ca2d6bc166a0028f
• http://moodle.org/mod/forum/discuss.php?d=175592
• http://openwall.com/lists/oss-security/2011/11/14/1
• http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=5a3010310bff0b3946804a72ca2d6bc166a0028f
• http://moodle.org/mod/forum/discuss.php?d=175592
• http://openwall.com/lists/oss-security/2011/11/14/1

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