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NVD / CVE Program· CNA fedora

CVE-2023-30943: Moodle: tinymce loaders susceptible to arbitrary folder creation

Noroxi assessment

Priority: Monitor (action score 23/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 6.8% (FIRST EPSS); higher than 94% of all records.
  • 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 4.1.3.

Low priority for now. Upgrade to git.moodle.org moodle 4.1.3 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

Primary sources: NVD · CVE.org · FIRST EPSS

The vulnerability was found Moodle which exists because the application allows a user to control path of the older to create in TinyMCE loaders. A remote user can send a specially crafted HTTP request and create arbitrary folders on the system.

MediumCVSS 5.3 · v3.1—Proof of concept Fix available
Published
May 2, 2023
Updated
Jun 17, 2026
EPSS
6.8% · 94th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 6.8%

CNA vs NVD score

NVD
5.3
CNA · fedora
6.5
1.2 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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
  • Proof of concept exists, no weaponized module
  • A fix has been released

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

Follow CVE-2023-30943

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 fedora36
  • fedoraproject fedora37
  • fedoraproject fedora38
  • moodle moodle4.1.0 and later · before 4.1.3

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

    • 4.1.0 and later · before 4.1.3affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Packagistmoodle/moodlebefore 4.2.0-rc24.2.0-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
    60This week
  • 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.
    49Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-28336Mar 23, 2023 · Moodle: teacher can access names of users they do not have permission to access
    17Monitor
  • ← EarlierCVE-2022-40208Mar 24, 2023 · In Moodle, insufficient limitations in some quiz web services made it possible for students to bypass sequential navigation during a quiz at
    17Monitor
  • Later →CVE-2023-30944May 2, 2023 · Moodle: minor sql injection risk in external wiki method for listing pages
    29Monitor

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 moodle4.1.3Vendor (CNA)
Packagist:moodle/moodle4.2.0-rc2Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2023-30943 —
Proof-of-concept repository on GitHubstars:182023-08-31
Proof-of-concept repository on GitHubstars:142023-09-07
Proof-of-concept repository on GitHubstars:22024-03-21

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.

  1. Published
  2. First PoC+120 d
  3. TodayNov 9, 2026+1287 d

No history yet (it accumulates with the daily EPSS job).

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.

Variant candidates

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

No nightly-computed relations.

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

Weakness class (CWE)

CWE-73 · External Control of File Name or Path

CVSS vector

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

nvd-primary

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 (5 more)

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

All records