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vuln-cve/data/2026/4xxx/CVE-2026-4351.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-4351",
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"state": "PUBLISHED",
"assignerShortName": "Wordfence",
"dateReserved": "2026-03-17T17:19:49.858Z",
"datePublished": "2026-04-10T01:24:59.539Z",
"dateUpdated": "2026-04-10T15:54:52.222Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence",
"dateUpdated": "2026-04-10T01:24:59.539Z"
},
"affected": [
{
"vendor": "perfmatters",
"product": "Perfmatters",
"versions": [
{
"version": "0",
"status": "affected",
"lessThanOrEqual": "2.5.9",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the `PMCS::action_handler()` method processing the bulk action `activate`/`deactivate` handlers without any authorization check or nonce verification. The `$_GET['snippets'][]` values are passed unsanitized to `Snippet::activate()`/`Snippet::deactivate()` which call `Snippet::update()` then `file_put_contents()` with the traversed path. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite arbitrary files on the server with a fixed PHP docblock content, potentially causing denial of service by corrupting critical files like `.htaccess` or `index.php`."
}
],
"title": "Perfmatters <= 2.5.9 - Authenticated (Subscriber+) Arbitrary File Overwrite via 'snippets' Parameter",
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c172ab2b-ce1f-4a0d-b31f-b75ff2f03506?source=cve"
},
{
"url": "https://perfmatters.io/docs/changelog/"
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
"cweId": "CWE-22",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"baseScore": 8.1,
"baseSeverity": "HIGH"
}
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Phú"
}
],
"timeline": [
{
"time": "2026-03-19T20:20:05.000Z",
"lang": "en",
"value": "Vendor Notified"
},
{
"time": "2026-04-09T11:55:00.000Z",
"lang": "en",
"value": "Disclosed"
}
]
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-10T15:51:30.180464Z",
"id": "CVE-2026-4351",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-04-10T15:54:52.222Z"
}
}
]
}
}