MoodleCMS
CVE-2025-26527
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedTags not expected to be visible to a user could still be discovered by them via the tag search page or in the tags block.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysisA detailed technical summary for this CVE is being prepared.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
MoodleCMS
>= 4.1.0, < 4.1.16>= 4.3.0, < 4.3.10>= 4.4.0, < 4.4.6>= 4.5.0, < 4.5.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped4.1.164.3.104.4.6
4.1.16, 4.3.10, 4.4.6, or 4.5.2 (depending on your current branch)
- 1. Identify your current Moodle version from the administration dashboard (Site Administration > Server > Environment or the Moodle welcome page)
- 2. Determine which version branch you are on (4.1.x, 4.3.x, 4.4.x, or 4.5.x)
- 3. Download the appropriate fixed release from moodle.org/downloads: 4.1.16, 4.3.10, 4.4.6, or 4.5.2
- 4. Backup your Moodle database and moodledata directory before upgrading
- 5. Put your site into maintenance mode via Site Administration > Server > Maintenance Mode
- 6. Replace the Moodle code directory with the new version, preserving config.php and any custom code in local/ or theme/ directories
- 7. Complete the upgrade by accessing the site as administrator - the upgrade process will run automatically
- 8. Verify the fix by testing tag visibility: create a tag with restricted visibility and confirm it cannot be discovered via the tag search page or tags block by unauthorized users
Generated from the published advisory — verify against the referenced sources before acting.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-26527 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-26527 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data