CVE-2026-113683CWE-79cross-site-scripting

CVE-2026-113683

Medium · published October 20, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
20.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
5.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00293 · 20.9th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-20T20:17Z
References (4)
https://github.com/jcrodriguez-dis/moodle-mod_vpl/blob/V4.5.0/similarity/diff.class.php#L412-L419 · [email protected]https://github.com/jcrodriguez-dis/moodle-mod_vpl/commit/5dd7fe00df2816b692f8ea262c6fa8cdee0b26b7 · [email protected]https://github.com/jcrodriguez-dis/moodle-mod_vpl/releases/tag/V5.0.0 · [email protected]https://www.vulncheck.com/advisories/vpl-for-moodle-before-5.0.0-reflected-xss-via-similarity-diff-php-filename · [email protected]
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 15:40Z
    VPL for Moodle before 5.0.0 Reflected XSS via similarity/diff.php filename
    cvelistv5
  • 20 OCT 15:40Z
    VPL for Moodle before 5.0.0 Reflected XSS via similarity/diff.php filename
    cvelistv5