Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service (moodle)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.51 % · percentile 43 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- fedora
- NVD status
- Analyzed
Description
A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
- CWE-770 — Allocation of Resources Without Limits or Throttling
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | fedora |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · patrick@puiterwijk.org (Secondary) |
Advisories
- GHSA-cg8j-5cr2-568q — Moodle TeX formula editor is vulnerable to DoS through lack of execution time limits
European references
- ENISA EUVD · EUVD-2026-7527
- GCVE · GCVE-0-2026-26047
CERT-FR advisories
- CERTFR-2026-AVI-0177 — Multiples vulnérabilités dans Moodle · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*< 4.5.9cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*≥ 5.0.0 < 5.0.5cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*≥ 5.1.0 < 5.1.2
Affected products
| Product | Versions |
|---|---|
| moodle | affected 0 < 4.5.9 ; affected 5.0.0 < 5.0.5 ; affected 5.1.0 < 5.1.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |