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CVE.org (no NVD analysis yet)· CNA fedora

CVE-2026-102580: Moodle: arbitrary class instantiation via report builder audience classname

MediumCVSS 4.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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: 0.23% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: git.moodle.org moodle 4.5.13, 5.0.9, 5.1.6.
  • Severity is disputed: the assigning authority (CNA) scores it 2.2, NVD 4.3.

Low priority for now. Upgrade to git.moodle.org moodle 4.5.13, 5.0.9, 5.1.6 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

A flaw was found in Moodle. An authenticated attacker can supply an improperly validated audience class name to the Report Builder component, allowing arbitrary class instantiation. This vulnerability enables the unauthorized creation of internal program objects, which may result in unexpected application behavior.

Published
Sep 30, 2026
Updated
Oct 1, 2026
EPSS
0.2% · 14th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
4.3
CNA · fedora
2.2
2.1 point gap

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/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-2026-102580

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

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

    • 5.2.0 and later · before 5.2.2affected · semver
    • 5.1.0 and later · before 5.1.6affected · semver
    • 5.0.0 and later · before 5.0.9affected · semver
    • before 4.5.13affected · semver
Affected versions · NVD (4)

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

  • moodle moodlebefore 4.5.13
  • moodle moodle5.0.0 and later · before 5.0.9
  • moodle moodle5.1.0 and later · before 5.1.6
  • moodle moodle5.2.0 and later · before 5.2.2

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-2026-102578Sep 30, 2026 · Moodle: sql injection in question bank web service
    35Monitor
  • ← EarlierCVE-2026-102579Sep 30, 2026 · Moodle: user profile information disclosure via grade web service
    17Monitor
  • Later →CVE-2026-102581Sep 30, 2026 · Moodle: xss in forum post templates due to insufficient escaping
    21Monitor

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 moodle4.5.13Vendor (CNA)
git.moodle.org moodle5.0.9Vendor (CNA)
git.moodle.org moodle5.1.6Vendor (CNA)
git.moodle.org moodle5.2.2Vendor (CNA)

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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+44 d
EPSS, last 120 days

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

Credits

All researchers

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

Not on record for this CVE: patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • 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
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-470 · Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/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.

ATT&CK techniques

—

Change log

  1. CVSS2.2 → 4.3
  2. Severitylow → medium
  3. SSVC exploitation— → none
  4. Exploit maturity— → none
  5. Fix✗ → ✓

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

References

Show all references (3 more)

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

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