# CVE-2026-123655: Moodle: missing access checks on h5p content files

Status: published. Published: 2026-11-06. Updated: 2026-11-06.

A flaw was found in Moodle. Insufficient access control checks on H5P content files allow unauthenticated remote attackers to view restricted materials, including content stored in the system context and files belonging to hidden or unavailable course modules. This issue results in unauthorized information disclosure of protected content.

## Remediation

No remediation reported in collected sources

## Affected products and versions

-  /  (moodle): ≥ 4.5.0; < 4.5.15 (affected, semver); ≥ 5.0.0; < 5.0.11 (affected, semver); ≥ 5.1.0; < 5.1.8 (affected, semver); ≥ 5.2.0; < 5.2.4 (affected, semver). Source: CNA: fedora

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; source: CNA: fedora

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-862

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-123655 (CNA: fedora; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2568053 (CNA: fedora; issue-tracking, x_refsource_REDHAT)

- https://github.com/moodle/moodle/commit/4b42ce4ed1d132214fd4b7d4b5f4f0387ec28a49 (CNA: fedora)

- https://moodle.org/mod/forum/discuss.php?d=482830 (CNA: fedora)

## Provenance

- CNA: fedora: https://www.cve.org/CVERecord?id=CVE-2026-123655; retrieved 2026-11-06; source updated 2026-11-06

Revision: 676c89ea5901cd1d3d23833820e8ea6b6f3b2e2e96877f0f20e5d33ac07d3f6d

Canonical: https://y2.dev/cve/CVE-2026-123655

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.