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Fencer Vulns
high 8.3

CVE-2025-26530 json

Reflected XSS via question bank filter

published 2025-02-24 20 mo ago modified 2026-09-10 1 mo ago also BIT-moodle-2025-26530 , EUVD-2025-4271 , GHSA-4w32-c9g7-27qx

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

The question bank filter required additional sanitizing to prevent a reflected XSS risk.

Patch / fix

  • packagist moodle/moodle 4.3.10, 4.4.6, 4.5.2
  • bitnami moodle 4.3.10, 4.4.6, 4.5.2
  • Moodle Project moodle 4.3.10, 4.4.6, 4.5.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-26530 updated cvss 8.3

moodle: Reflected XSS via question bank filter

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
GitHub 3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV 3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
>=4.5.0-beta, <4.5.2
>=4.4.0-beta, <4.4.6
>=4.3.0-beta, <4.3.10
4.5.2
4.4.6
4.3.10
bitnami moodle
>=4.3.0, <4.3.10
>=4.4.0, <4.4.6
>=4.5.0, <4.5.2
4.3.10
4.4.6
4.5.2

Affected products

  • Moodle Project moodle

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.