CVE-2026-11896 (GCVE-0-2026-11896)
Vulnerability from cvelistv5 – Published: 2026-07-02 08:33 – Updated: 2026-07-02 19:42
VLAI
EPSS
VEX
Title
My Calendar <= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'vcal' Parameter
Summary
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the 'vcal' parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 19:35 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
14 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| joedolson | My Calendar – Accessible Event Manager |
Affected:
0 , ≤ 3.7.14
(semver)
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-11896",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-02T19:35:04.804313Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-02T19:42:08.293Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "My Calendar \u2013 Accessible Event Manager",
"vendor": "joedolson",
"versions": [
{
"lessThanOrEqual": "3.7.14",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Athiwat Tiprasaharn (Jitlada)"
},
{
"lang": "en",
"type": "finder",
"value": "Tharadol Suksamran (d3kc4rt_1)"
}
],
"descriptions": [
{
"lang": "en",
"value": "The My Calendar \u2013 Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the \u0027vcal\u0027 parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639 Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-02T08:33:06.892Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3572191%40my-calendar\u0026new=3572191%40my-calendar\u0026sfp_email=\u0026sfph_mail="
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-10T15:55:08.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-07-01T20:04:38.000Z",
"value": "Disclosed"
}
],
"title": "My Calendar \u003c= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via \u0027vcal\u0027 Parameter"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-11896",
"datePublished": "2026-07-02T08:33:06.892Z",
"dateReserved": "2026-06-10T15:39:57.936Z",
"dateUpdated": "2026-07-02T19:42:08.293Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-11896",
"date": "2026-09-19",
"epss": "0.00544",
"percentile": "0.44534"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "My Calendar \u2013 Accessible Event Manager",
"vendor": "joedolson",
"versions": [
{
"lessThanOrEqual": "3.7.14",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"source": "security@wordfence.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The My Calendar \u2013 Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the \u0027vcal\u0027 parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata."
}
],
"id": "CVE-2026-11896",
"lastModified": "2026-07-02T20:17:00.593",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "security@wordfence.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-11896",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-02T19:35:04.804313Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-02T10:16:27.280",
"references": [
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3572191%40my-calendar\u0026new=3572191%40my-calendar\u0026sfp_email=\u0026sfph_mail="
},
{
"source": "security@wordfence.com",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve"
}
],
"sourceIdentifier": "security@wordfence.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-639"
}
],
"source": "security@wordfence.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-11896",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-02T19:35:04.804313Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-02T19:42:03.265Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "My Calendar \u2013 Accessible Event Manager",
"vendor": "joedolson",
"versions": [
{
"lessThanOrEqual": "3.7.14",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Athiwat Tiprasaharn (Jitlada)"
},
{
"lang": "en",
"type": "finder",
"value": "Tharadol Suksamran (d3kc4rt_1)"
}
],
"descriptions": [
{
"lang": "en",
"value": "The My Calendar \u2013 Accessible Event Manager plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14 via the \u0027vcal\u0027 parameter due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate occurrence IDs and access the full iCalendar export of non-public, draft, trashed, and personal calendar events, disclosing sensitive event metadata including titles, descriptions, dates, locations, organizer and host details, permalinks, and related calendar metadata."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "CWE-639 Authorization Bypass Through User-Controlled Key",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-02T08:33:06.892Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/a72639df-fa05-414c-b30c-eb285f59d945?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L212"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar.php#L209"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-api.php#L246"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/my-calendar-events.php#L748"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/ical.php#L26"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.14/includes/date-utilities.php#L417"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L212"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar.php#L209"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-api.php#L246"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-events.php#L748"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/ical.php#L26"
},
{
"url": "https://plugins.trac.wordpress.org/browser/my-calendar/trunk/includes/date-utilities.php#L417"
},
{
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3572191%40my-calendar\u0026new=3572191%40my-calendar\u0026sfp_email=\u0026sfph_mail="
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-10T15:55:08.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-07-01T20:04:38.000Z",
"value": "Disclosed"
}
],
"title": "My Calendar \u003c= 3.7.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via \u0027vcal\u0027 Parameter"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-11896",
"datePublished": "2026-07-02T08:33:06.892Z",
"dateReserved": "2026-06-10T15:39:57.936Z",
"dateUpdated": "2026-07-02T19:42:08.293Z",
"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…
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…