CVE-2026-113683

MEDIUM 6.1

VPL for Moodle before 5.0.0 Reflected XSS via similarity/diff.php filename

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

VPL (Virtual Programming Lab) for Moodle before 5.0.0 contains a reflected cross-site scripting vulnerability that allows remote attackers to inject script via unencoded filename1/filename2 parameters in similarity/diff.php. Attackers can craft a diff.php link with a JavaScript payload that runs when a user holding mod/vpl:similarity opens it, performing actions or disclosing data under their session.

CWE	CWE-79
Vendor	jcrodriguez-dis
Product	moodle-mod_vpl
Published	Oct 20, 2026

Stay Ahead of the Next One

Get instant alerts for jcrodriguez-dis moodle-mod_vpl

Be the first to know when new medium vulnerabilities affecting jcrodriguez-dis moodle-mod_vpl are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

jcrodriguez-dis / moodle-mod_vpl

0 < 5.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/jcrodriguez-dis/moodle-mod_vpl/commit/5dd7fe00df2816b692f8ea262c6fa8cdee0b26b7 github.com: https://github.com/jcrodriguez-dis/moodle-mod_vpl/releases/tag/V5.0.0 github.com: https://github.com/jcrodriguez-dis/moodle-mod_vpl/blob/V4.5.0/similarity/diff.class.php#L412-L419 vulncheck.com: https://www.vulncheck.com/advisories/vpl-for-moodle-before-5.0.0-reflected-xss-via-similarity-diff-php-filename

Credits

Trần Văn Hoàng