CVE-2025-67555 (GCVE-0-2025-67555)
Vulnerability from cvelistv5 – Published: 2025-12-09 14:14 – Updated: 2026-04-28 16:14
VLAI
EPSS
VEX
Title
WordPress UseStrict's Calendly Embedder plugin <= 1.1.7.2 - Cross Site Scripting (XSS) vulnerability
Summary
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in useStrict UseStrict's Calendly Embedder cal-embedder-lite allows Stored XSS.This issue affects UseStrict's Calendly Embedder: from n/a through <= 1.1.7.2.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-10 21:40 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| useStrict | UseStrict's Calendly Embedder |
Affected:
0 , ≤ 1.1.7.2
(custom)
|
guessed |
Date Public
2026-04-22 14:24
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-67555",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-10T21:40:12.831480Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T17:34:34.809Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected",
"packageName": "cal-embedder-lite",
"product": "UseStrict\u0027s Calendly Embedder",
"vendor": "useStrict",
"versions": [
{
"changes": [
{
"at": "1.2",
"status": "unaffected"
}
],
"lessThanOrEqual": "1.1.7.2",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Nabil Irawan | Patchstack Bug Bounty Program"
}
],
"datePublic": "2026-04-22T14:24:20.896Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in useStrict UseStrict\u0027s Calendly Embedder cal-embedder-lite allows Stored XSS.\u003cp\u003eThis issue affects UseStrict\u0027s Calendly Embedder: from n/a through \u003c= 1.1.7.2.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in useStrict UseStrict\u0027s Calendly Embedder cal-embedder-lite allows Stored XSS.This issue affects UseStrict\u0027s Calendly Embedder: from n/a through \u003c= 1.1.7.2."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "Stored XSS"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-28T16:14:21.160Z",
"orgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"shortName": "Patchstack"
},
"references": [
{
"tags": [
"vdb-entry"
],
"url": "https://patchstack.com/database/Wordpress/Plugin/cal-embedder-lite/vulnerability/wordpress-usestrict-s-calendly-embedder-plugin-1-1-7-2-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"title": "WordPress UseStrict\u0027s Calendly Embedder plugin \u003c= 1.1.7.2 - Cross Site Scripting (XSS) vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2025-67555",
"datePublished": "2025-12-09T14:14:08.288Z",
"dateReserved": "2025-12-09T12:21:23.942Z",
"dateUpdated": "2026-04-28T16:14:21.160Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-67555",
"date": "2026-09-24",
"epss": "0.0021",
"percentile": "0.0995"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected",
"packageName": "cal-embedder-lite",
"product": "UseStrict\u0027s Calendly Embedder",
"vendor": "useStrict",
"versions": [
{
"changes": [
{
"at": "1.2",
"status": "unaffected"
}
],
"lessThanOrEqual": "1.1.7.2",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "audit@patchstack.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in useStrict UseStrict\u0027s Calendly Embedder cal-embedder-lite allows Stored XSS.This issue affects UseStrict\u0027s Calendly Embedder: from n/a through \u003c= 1.1.7.2."
}
],
"id": "CVE-2025-67555",
"lastModified": "2026-06-17T09:57:50.260",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 1.7,
"impactScore": 3.7,
"source": "audit@patchstack.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-67555",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-10T21:40:12.831480Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-12-09T16:18:31.753",
"references": [
{
"source": "audit@patchstack.com",
"url": "https://patchstack.com/database/Wordpress/Plugin/cal-embedder-lite/vulnerability/wordpress-usestrict-s-calendly-embedder-plugin-1-1-7-2-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"sourceIdentifier": "audit@patchstack.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-79"
}
],
"source": "audit@patchstack.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-04-29T01:41:51+00:00",
"cve": "CVE-2025-67555",
"id": "CVE-2025-67555",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "WordPress UseStrict\u0027s Calendly Embedder plugin \u003c= 1.1.7.2 - Cross Site Scripting (XSS) vulnerability",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-67555.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-67555",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-10T21:40:12.831480Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-12-10T21:40:07.038Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://wordpress.org/plugins",
"defaultStatus": "unaffected",
"packageName": "cal-embedder-lite",
"product": "UseStrict\u0027s Calendly Embedder",
"vendor": "useStrict",
"versions": [
{
"changes": [
{
"at": "1.2",
"status": "unaffected"
}
],
"lessThanOrEqual": "1.1.7.2",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Nabil Irawan | Patchstack Bug Bounty Program"
}
],
"datePublic": "2026-04-22T14:24:20.896Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in useStrict UseStrict\u0027s Calendly Embedder cal-embedder-lite allows Stored XSS.\u003cp\u003eThis issue affects UseStrict\u0027s Calendly Embedder: from n/a through \u003c= 1.1.7.2.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) vulnerability in useStrict UseStrict\u0027s Calendly Embedder cal-embedder-lite allows Stored XSS.This issue affects UseStrict\u0027s Calendly Embedder: from n/a through \u003c= 1.1.7.2."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "Stored XSS"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-28T16:14:21.160Z",
"orgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"shortName": "Patchstack"
},
"references": [
{
"tags": [
"vdb-entry"
],
"url": "https://patchstack.com/database/Wordpress/Plugin/cal-embedder-lite/vulnerability/wordpress-usestrict-s-calendly-embedder-plugin-1-1-7-2-cross-site-scripting-xss-vulnerability?_s_id=cve"
}
],
"title": "WordPress UseStrict\u0027s Calendly Embedder plugin \u003c= 1.1.7.2 - Cross Site Scripting (XSS) vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3",
"assignerShortName": "Patchstack",
"cveId": "CVE-2025-67555",
"datePublished": "2025-12-09T14:14:08.288Z",
"dateReserved": "2025-12-09T12:21:23.942Z",
"dateUpdated": "2026-04-28T16:14:21.160Z",
"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…