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Noroxi
CVE-2023-5545· NVD / CVE Program· CNA fedora

Moodle: auto-populated h5p author name causes a potential information leak

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.53% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: git.moodle.org moodle 3.11.17, 3.9.24, 4.0.11.
  • Severity is disputed: the assigning authority (CNA) scores it 3.3, NVD 5.3.

Low priority for now. Upgrade to git.moodle.org moodle 3.11.17, 3.9.24, 4.0.11 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

H5P metadata automatically populated the author with the user's username, which could be sensitive information.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Nov 9, 2023
Updated
Jun 17, 2026
EPSS
0.5% · 44th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · fedora
3.3
2.0 point gap

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-5545

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
moodlemoodle
fedoraprojectextra packages for enterprise linux
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject extra packages for enterprise linux7.0
  • fedoraproject fedora38
  • moodle moodle4.0.0 and later · before 4.0.11
  • moodle moodlebefore 3.9.24
  • moodle moodle4.2.0 and later · before 4.2.3
  • moodle moodle4.1.0 and later · before 4.1.6
  • moodle moodle3.11.0 and later · before 3.11.17

Versions reported by the vendor

Affected version ranges reported by the assigning authority (fedora). Independent of NVD's CPE analysis and usually ahead of it.

  • git.moodle.org moodle

    • 4.2.0 and later · before 4.2.3affected · semver
    • 4.1.0 and later · before 4.1.6affected · semver
    • 4.0.0 and later · before 4.0.11affected · semver
    • 3.11.0 and later · before 3.11.17affected · semver
    • before 3.9.24affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Packagistmoodle/moodlebefore 4.3.0-rc24.3.0-rc2

Same product

moodle: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-43425Moodle: remote code execution via calculated question types
    58Plan
  • CVE-2021-36393In Moodle, an SQL injection risk was identified in the library fetching a user's recent courses.
    55Plan
  • CVE-2022-0332A flaw was found in Moodle in versions 3.11 to 3.11.4.
    52Plan
  • CVE-2022-35650The vulnerability was found in Moodle, occurs due to input validation error when importing lesson questions.
    46Plan
  • CVE-2018-1133An issue was discovered in Moodle 3.x.
    44Plan
  • CVE-2021-21809A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10.
    43Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
git.moodle.org moodle3.11.17Vendor (CNA)
git.moodle.org moodle3.9.24Vendor (CNA)
git.moodle.org moodle4.0.11Vendor (CNA)
git.moodle.org moodle4.1.6Vendor (CNA)
git.moodle.org moodle4.2.3Vendor (CNA)
Packagist:moodle/moodle4.3.0-rc2Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-32044533 days apartMoodle: unauthenticated rest api user data exposure
    30Monitor
  • CVE-2024-34002204 days apartmoodle: authenticated LFI risk in some misconfigured shared hosting environments via modified mod_feedback backup
    26Monitor
  • CVE-2024-34004204 days apartmoodle: authenticated LFI risk in some misconfigured shared hosting environments via modified mod_wiki backup
    26Monitor
  • CVE-2024-34005204 days apartmoodle: authenticated LFI risk in some misconfigured shared hosting environments via modified mod_data backup
    26Monitor
  • CVE-2024-34003204 days apartmoodle: authenticated LFI risk in some misconfigured shared hosting environments via modified mod_workshop backup
    23Monitor
  • CVE-2023-28336231 days apartMoodle: teacher can access names of users they do not have permission to access
    17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records