CVE-2026-102580
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.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Base score: 4.3
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.24%
- Percentile among all scored CVEs: 13
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1210Exploitation of Remote Serviceslateral movement65 % - Primary impact
T1059Command and Scripting Interpreterexecution55 % - Secondary impact
T1565.001Stored Data Manipulationimpact45 %
AV:N con autenticación (PR:L) indica explotación de servicio remoto. Instantiación arbitraria de clases puede permitir ejecución de código o manipulación de datos, aunque sin evidencia explícita del impacto final.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
CWEs
- CWE-470
References
Raw JSON (NVD)
Show
{
"id": "CVE-2026-102580",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-102580",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-09-30T14:35:40.489112Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "patrick@puiterwijk.org",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 2.2,
"attackVector": "NETWORK",
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "NONE",
"privilegesRequired": "HIGH",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 0.7
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 4.3,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"integrityImpact": "LOW",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"exploitabilityScore": 2.8
}
]
},
"affected": [
{
"source": "patrick@puiterwijk.org",
"affectedData": [
{
"versions": [
{
"status": "affected",
"version": "5.2.0",
"lessThan": "5.2.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.1.0",
"lessThan": "5.1.6",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.0.0",
"lessThan": "5.0.9",
"versionType": "semver"
},
{
"status": "affected",
"version": "0",
"lessThan": "4.5.13",
"versionType": "semver"
}
],
"packageName": "moodle",
"collectionURL": "https://git.moodle.org",
"defaultStatus": "unaffected"
}
]
}
],
"published": "2026-09-30T09:17:15.080",
"references": [
{
"url": "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-89078",
"tags": [
"Patch"
],
"source": "patrick@puiterwijk.org"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-102580",
"tags": [
"Third Party Advisory"
],
"source": "patrick@puiterwijk.org"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543635",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"source": "patrick@puiterwijk.org"
},
{
"url": "https://moodle.org/mod/forum/discuss.php?d=482498",
"tags": [
"Vendor Advisory"
],
"source": "patrick@puiterwijk.org"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "patrick@puiterwijk.org",
"description": [
{
"lang": "en",
"value": "CWE-470"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"lastModified": "2026-10-01T14:36:39.630",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "99FF93A9-D754-4DE4-8D1B-B4C324CDA91A",
"versionEndExcluding": "4.5.13"
},
{
"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "11BA4A97-DFEA-4813-B107-4BA4C0BD78DB",
"versionEndExcluding": "5.0.9",
"versionStartIncluding": "5.0.0"
},
{
"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "37F95B02-166C-45BA-B537-21CB5084001F",
"versionEndExcluding": "5.1.6",
"versionStartIncluding": "5.1.0"
},
{
"criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EFDDCBAE-2DFF-45D6-A90A-2A9AC1743722",
"versionEndExcluding": "5.2.2",
"versionStartIncluding": "5.2.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "patrick@puiterwijk.org"
}