CVE-2026-104723 (GCVE-0-2026-104723)
Vulnerability from cvelistv5 – Published: 2026-10-10 05:31 – Updated: 2026-10-11 16:55
VLAI
EPSS
VEX
Title
LifterLMS <= 10.2.1 - Authenticated (Custom+) PHP Object Injection via 'custom' Lesson Data
Summary
The LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor's Assistant, LMS Manager, or Administrator.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-11 16:42 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
6 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| lifterlms | LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes |
Affected:
0 , ≤ 10.2.1
(semver)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-104723",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-11T16:42:40.241110Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-11T16:55:17.089Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes",
"vendor": "lifterlms",
"versions": [
{
"lessThanOrEqual": "10.2.1",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Wordfence PRISM"
}
],
"descriptions": [
{
"lang": "en",
"value": "The LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor\u0027s Assistant, LMS Manager, or Administrator."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502 Deserialization of Untrusted Data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-10T05:31:04.327Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/cc7893ee-414d-4796-bb34-4d83951b95bd?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1218"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L458"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L993"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1576"
},
{
"url": "https://plugins.trac.wordpress.org/changeset/3729229/lifterlms/trunk/includes/admin/class.llms.admin.builder.php"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-10-02T12:00:21.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-10-09T17:20:42.000Z",
"value": "Disclosed"
}
],
"title": "LifterLMS \u003c= 10.2.1 - Authenticated (Custom+) PHP Object Injection via \u0027custom\u0027 Lesson Data"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-104723",
"datePublished": "2026-10-10T05:31:04.327Z",
"dateReserved": "2026-10-02T11:45:07.720Z",
"dateUpdated": "2026-10-11T16:55:17.089Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-104723",
"date": "2026-10-11",
"epss": "0.00447",
"percentile": "0.36984"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes",
"vendor": "lifterlms",
"versions": [
{
"lessThanOrEqual": "10.2.1",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "security@wordfence.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor\u0027s Assistant, LMS Manager, or Administrator."
}
],
"id": "CVE-2026-104723",
"lastModified": "2026-10-11T17:16:59.200",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9,
"source": "security@wordfence.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-104723",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-11T16:42:40.241110Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-10T06:16:38.760",
"references": [
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1218"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1576"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L458"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L993"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/changeset/3729229/lifterlms/trunk/includes/admin/class.llms.admin.builder.php"
},
{
"source": "security@wordfence.com",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/cc7893ee-414d-4796-bb34-4d83951b95bd?source=cve"
}
],
"sourceIdentifier": "security@wordfence.com",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-502"
}
],
"source": "security@wordfence.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-104723",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-11T16:42:40.241110Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-11T16:45:49.962Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes",
"vendor": "lifterlms",
"versions": [
{
"lessThanOrEqual": "10.2.1",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Wordfence PRISM"
}
],
"descriptions": [
{
"lang": "en",
"value": "The LifterLMS \u2013 WP LMS for eLearning, Online Courses, \u0026 Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor\u0027s Assistant, LMS Manager, or Administrator."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502 Deserialization of Untrusted Data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-10T05:31:04.327Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/cc7893ee-414d-4796-bb34-4d83951b95bd?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1218"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L458"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L993"
},
{
"url": "https://plugins.trac.wordpress.org/browser/lifterlms/tags/10.2.1/includes/admin/class.llms.admin.builder.php#L1576"
},
{
"url": "https://plugins.trac.wordpress.org/changeset/3729229/lifterlms/trunk/includes/admin/class.llms.admin.builder.php"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-10-02T12:00:21.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-10-09T17:20:42.000Z",
"value": "Disclosed"
}
],
"title": "LifterLMS \u003c= 10.2.1 - Authenticated (Custom+) PHP Object Injection via \u0027custom\u0027 Lesson Data"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-104723",
"datePublished": "2026-10-10T05:31:04.327Z",
"dateReserved": "2026-10-02T11:45:07.720Z",
"dateUpdated": "2026-10-10T05:31:04.327Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…