CVE-2026-8616 (GCVE-0-2026-8616)
Vulnerability from cvelistv5 – Published: 2026-07-17 02:31 – Updated: 2026-07-17 02:31
VLAI
EPSS
VEX
Title
Fense Proxy & VPN Blocker <= 3.0.1 - Missing Authorization to Unauthenticated Plugin Option/Transient Deletion via fense_bpvt_save_settings AJAX Action
Summary
The Fense Proxy & VPN Blocker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and missing nonce validation on the fense_bpvt_save_settings() function in versions up to, and including, 3.0.1. The callback is registered to both wp_ajax_* and wp_ajax_nopriv_* hooks and unconditionally calls delete_option() on four plugin options and delete_transient() on three transients tied to the plugin's API key cache and settings. This makes it possible for unauthenticated attackers to delete plugin options and transients, effectively resetting the plugin's API key/data cache and forcing the plugin to refetch state.
Severity
5.3 (Medium)
CWE
- CWE-862 - Missing Authorization
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| devozon | Fense Proxy & VPN Blocker |
Affected:
0 , ≤ 3.0.1
(semver)
|
Credits
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Fense Proxy \u0026 VPN Blocker",
"vendor": "devozon",
"versions": [
{
"lessThanOrEqual": "3.0.1",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Legion Hunter"
}
],
"descriptions": [
{
"lang": "en",
"value": "The Fense Proxy \u0026 VPN Blocker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and missing nonce validation on the fense_bpvt_save_settings() function in versions up to, and including, 3.0.1. The callback is registered to both wp_ajax_* and wp_ajax_nopriv_* hooks and unconditionally calls delete_option() on four plugin options and delete_transient() on three transients tied to the plugin\u0027s API key cache and settings. This makes it possible for unauthenticated attackers to delete plugin options and transients, effectively resetting the plugin\u0027s API key/data cache and forcing the plugin to refetch state."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862 Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-17T02:31:30.556Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
{
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1208ac78-4a56-4daa-b935-d579f07f8e8e?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/2.9.0/includes/system/fense-bpvt-header-code.php#L32"
},
{
"url": "https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/2.9.0/includes/system/fense-bpvt-header-code.php#L48"
},
{
"url": "https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/3.0.2/includes/system/header-code.php?rev=3574545"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-15T21:43:06.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-07-16T14:07:41.000Z",
"value": "Disclosed"
}
],
"title": "Fense Proxy \u0026 VPN Blocker \u003c= 3.0.1 - Missing Authorization to Unauthenticated Plugin Option/Transient Deletion via fense_bpvt_save_settings AJAX Action"
}
},
"cveMetadata": {
"assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"assignerShortName": "Wordfence",
"cveId": "CVE-2026-8616",
"datePublished": "2026-07-17T02:31:30.556Z",
"dateReserved": "2026-05-14T17:37:53.682Z",
"dateUpdated": "2026-07-17T02:31:30.556Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-8616",
"date": "2026-07-19",
"epss": "0.00228",
"percentile": "0.13538"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-8616\",\"sourceIdentifier\":\"security@wordfence.com\",\"published\":\"2026-07-17T04:16:51.197\",\"lastModified\":\"2026-07-17T14:59:38.667\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The Fense Proxy \u0026 VPN Blocker plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and missing nonce validation on the fense_bpvt_save_settings() function in versions up to, and including, 3.0.1. The callback is registered to both wp_ajax_* and wp_ajax_nopriv_* hooks and unconditionally calls delete_option() on four plugin options and delete_transient() on three transients tied to the plugin\u0027s API key cache and settings. This makes it possible for unauthenticated attackers to delete plugin options and transients, effectively resetting the plugin\u0027s API key/data cache and forcing the plugin to refetch state.\"}],\"affected\":[{\"source\":\"security@wordfence.com\",\"affectedData\":[{\"vendor\":\"devozon\",\"product\":\"Fense Proxy \u0026 VPN Blocker\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThanOrEqual\":\"3.0.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"security@wordfence.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-862\"}]}],\"references\":[{\"url\":\"https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/2.9.0/includes/system/fense-bpvt-header-code.php#L32\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/2.9.0/includes/system/fense-bpvt-header-code.php#L48\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://plugins.trac.wordpress.org/browser/fense-block-vpn-proxy/tags/3.0.2/includes/system/header-code.php?rev=3574545\",\"source\":\"security@wordfence.com\"},{\"url\":\"https://www.wordfence.com/threat-intel/vulnerabilities/id/1208ac78-4a56-4daa-b935-d579f07f8e8e?source=cve\",\"source\":\"security@wordfence.com\"}]}}"
}
}
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…