CVE-2009-0502

Cross-site scripting (XSS) vulnerability in blocks/html/block_html.php in Snoopy 1.2.3, as used in Moodle 1.6 before 1.6.9, 1.7 before 1.7.7, 1.8 before 1.8.8, and 1.9 before 1.9.4, allows remote attackers to inject arbitrary web script or HTML via an HTML block, which is not properly handled when the "Login as" feature is used to visit a MyMoodle or Blog page.

Published: 2009-02-10 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0502 is rated Low Risk (38.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.47%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-0502

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.93% 0.47% -0.46%
2 2025-03-29 0.47% 0.93% +0.46%
3 2025-03-17 — 0.47% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0502

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2009-0502

OS Trackers for CVE-2009-0502

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2009-0502
ubuntu medium CVE-2009-0502 medium priority: Ubuntu including 1 source packages (moodle), 7 status rows across 7 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 3, ignored 2, not-affected 2. https://ubuntu.com/security/CVE-2009-0502

Affected software / configurations for CVE-2009-0502

Vendor Product Version Raw CPE
snoopy snoopy 1.2.3 cpe:2.3:a:snoopy:snoopy:1.2.3:*:*:*:*:*:*:*
moodle moodle 1.7.0 cpe:2.3:a:moodle:moodle:1.7.0:*:*:*:*:*:*:*
moodle moodle 1.7.1 cpe:2.3:a:moodle:moodle:1.7.1:*:*:*:*:*:*:*
moodle moodle 1.7.2 cpe:2.3:a:moodle:moodle:1.7.2:*:*:*:*:*:*:*
moodle moodle 1.7.3 cpe:2.3:a:moodle:moodle:1.7.3:*:*:*:*:*:*:*
moodle moodle 1.7.4 cpe:2.3:a:moodle:moodle:1.7.4:*:*:*:*:*:*:*
moodle moodle 1.7.5 cpe:2.3:a:moodle:moodle:1.7.5:*:*:*:*:*:*:*
moodle moodle 1.7.6 cpe:2.3:a:moodle:moodle:1.7.6:*:*:*:*:*:*:*
moodle moodle 1.8.1 cpe:2.3:a:moodle:moodle:1.8.1:*:*:*:*:*:*:*
moodle moodle 1.8.2 cpe:2.3:a:moodle:moodle:1.8.2:*:*:*:*:*:*:*
moodle moodle 1.8.3 cpe:2.3:a:moodle:moodle:1.8.3:*:*:*:*:*:*:*
moodle moodle 1.8.4 cpe:2.3:a:moodle:moodle:1.8.4:*:*:*:*:*:*:*
moodle moodle 1.8.5 cpe:2.3:a:moodle:moodle:1.8.5:*:*:*:*:*:*:*
moodle moodle 1.8.6 cpe:2.3:a:moodle:moodle:1.8.6:*:*:*:*:*:*:*
moodle moodle 1.8.7 cpe:2.3:a:moodle:moodle:1.8.7:*:*:*:*:*:*:*
moodle moodle 1.9.1 cpe:2.3:a:moodle:moodle:1.9.1:*:*:*:*:*:*:*
moodle moodle 1.9.2 cpe:2.3:a:moodle:moodle:1.9.2:*:*:*:*:*:*:*
moodle moodle 1.9.3 cpe:2.3:a:moodle:moodle:1.9.3:*:*:*:*:*:*:*

References for CVE-2009-0502

cvelogic Threat Intelligence