CVE-2021-39341 (GCVE-0-2021-39341)
Vulnerability from cvelistv5
Published
2021-11-01 21:01
Modified
2025-03-31 17:45
Severity ?
VLAI Severity ?
EPSS score ?
Summary
The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| OptinMonster | OptinMonster |
Version: 2.6.4 < |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-04T02:06:42.512Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39341"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2021-39341",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-31T17:45:12.515792Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-03-31T17:45:22.682Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "OptinMonster",
"vendor": "OptinMonster",
"versions": [
{
"lessThanOrEqual": "2.6.4",
"status": "affected",
"version": "2.6.4",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Chloe Chamberland, Wordfence"
}
],
"datePublic": "2021-11-01T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-285",
"description": "CWE-285 Improper Authorization",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-319",
"description": "CWE-319 Cleartext Transmission of Sensitive Information",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2021-11-01T21:01:23.000Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39341"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460"
}
],
"solutions": [
{
"lang": "en",
"value": "Update to version 2.6.5, or newer."
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "OptinMonster \u003c= 2.6.4 Unprotected REST-API Endpoints",
"x_generator": {
"engine": "Vulnogram 0.0.9"
},
"x_legacyV4Record": {
"CVE_data_meta": {
"AKA": "Wordfence",
"ASSIGNER": "security@wordfence.com",
"DATE_PUBLIC": "2021-11-01T09:02:00.000Z",
"ID": "CVE-2021-39341",
"STATE": "PUBLIC",
"TITLE": "OptinMonster \u003c= 2.6.4 Unprotected REST-API Endpoints"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "OptinMonster",
"version": {
"version_data": [
{
"version_affected": "\u003c=",
"version_name": "2.6.4",
"version_value": "2.6.4"
}
]
}
}
]
},
"vendor_name": "OptinMonster"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Chloe Chamberland, Wordfence"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-285 Improper Authorization"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-319 Cleartext Transmission of Sensitive Information"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/",
"refsource": "MISC",
"url": "https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/"
},
{
"name": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39341",
"refsource": "MISC",
"url": "https://wordfence.com/vulnerability-advisories/#CVE-2021-39341"
},
{
"name": "https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460",
"refsource": "MISC",
"url": "https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460"
}
]
},
"solution": [
{
"lang": "en",
"value": "Update to version 2.6.5, or newer."
}
],
"source": {
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2021-39341",
"datePublished": "2021-11-01T21:01:23.439Z",
"dateReserved": "2021-08-20T00:00:00.000Z",
"dateUpdated": "2025-03-31T17:45:22.682Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2021-39341\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2021-11-01T21:15:07.863\",\"lastModified\":\"2024-11-21T06:19:16.893\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.\"},{\"lang\":\"es\",\"value\":\"El plugin OptinMonster de WordPress es vulnerable a una divulgaci\u00f3n de informaci\u00f3n confidencial y a la actualizaci\u00f3n no autorizada de la configuraci\u00f3n debido a una comprobaci\u00f3n insuficiente de la autorizaci\u00f3n por medio de la funci\u00f3n logged_in_or_has_api_key en el archivo ~/OMAPI/RestApi.php que puede ser usada para explotar una inyecci\u00f3n de scripts web maliciosos en los sitios con el plugin instalado. Esto afecta a las versiones hasta 2.6.4 incluy\u00e9ndola\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":4.2}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:N\",\"baseScore\":6.4,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":4.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-285\"},{\"lang\":\"en\",\"value\":\"CWE-319\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:optinmonster:optinmonster:*:*:*:*:*:wordpress:*:*\",\"versionEndIncluding\":\"2.6.4\",\"matchCriteriaId\":\"B0852EB8-25C8-4C14-9813-CAAE64176994\"}]}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\",\"source\":\"security@wordfence.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\",\"source\":\"security@wordfence.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\",\"source\":\"security@wordfence.com\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}, {\"url\": \"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T02:06:42.512Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-39341\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-31T17:45:12.515792Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-31T17:45:05.036Z\"}}], \"cna\": {\"title\": \"OptinMonster \u003c= 2.6.4 Unprotected REST-API Endpoints\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"value\": \"Chloe Chamberland, Wordfence\"}], \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"OptinMonster\", \"product\": \"OptinMonster\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.4\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"2.6.4\"}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Update to version 2.6.5, or newer.\"}], \"datePublic\": \"2021-11-01T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\", \"tags\": [\"x_refsource_MISC\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-285\", \"description\": \"CWE-285 Improper Authorization\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-319\", \"description\": \"CWE-319 Cleartext Transmission of Sensitive Information\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2021-11-01T21:01:23.000Z\"}, \"x_legacyV4Record\": {\"credit\": [{\"lang\": \"eng\", \"value\": \"Chloe Chamberland, Wordfence\"}], \"impact\": {\"cvss\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, \"source\": {\"discovery\": \"UNKNOWN\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_name\": \"2.6.4\", \"version_value\": \"2.6.4\", \"version_affected\": \"\u003c=\"}]}, \"product_name\": \"OptinMonster\"}]}, \"vendor_name\": \"OptinMonster\"}]}}, \"solution\": [{\"lang\": \"en\", \"value\": \"Update to version 2.6.5, or newer.\"}], \"data_type\": \"CVE\", \"generator\": {\"engine\": \"Vulnogram 0.0.9\"}, \"references\": {\"reference_data\": [{\"url\": \"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\", \"name\": \"https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/\", \"refsource\": \"MISC\"}, {\"url\": \"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\", \"name\": \"https://wordfence.com/vulnerability-advisories/#CVE-2021-39341\", \"refsource\": \"MISC\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\", \"name\": \"https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460\", \"refsource\": \"MISC\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key function in the ~/OMAPI/RestApi.php file that can used to exploit inject malicious web scripts on sites with the plugin installed. This affects versions up to, and including, 2.6.4.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-285 Improper Authorization\"}]}, {\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-319 Cleartext Transmission of Sensitive Information\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-39341\", \"AKA\": \"Wordfence\", \"STATE\": \"PUBLIC\", \"TITLE\": \"OptinMonster \u003c= 2.6.4 Unprotected REST-API Endpoints\", \"ASSIGNER\": \"security@wordfence.com\", \"DATE_PUBLIC\": \"2021-11-01T09:02:00.000Z\"}}}}",
"cveMetadata": "{\"cveId\": \"CVE-2021-39341\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-31T17:45:22.682Z\", \"dateReserved\": \"2021-08-20T00:00:00.000Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2021-11-01T21:01:23.439Z\", \"assignerShortName\": \"Wordfence\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…