CVE-2026-104755

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104755", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-10-02T12:15:34.261Z", "datePublished": "2026-10-16T06:41:04.957Z", "dateUpdated": "2026-10-16T15:09:38.262Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-16T06:41:04.957Z"}, "affected": [{"vendor": "aresit", "product": "WP Compress \u2013 Instant Performance & Speed Optimization", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "7.25.00", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The WP Compress \u2013 Instant Performance & Speed Optimization plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 7.25.00 The vulnerability exists because the `start_comms` dispatcher (`wps_ic_comms::start_comms`), hooked on every front-end request, gates access only by comparing the caller-supplied `apikey` parameter against the stored plugin API key with no WordPress capability check and no nonce verification, then passes the unvalidated `group`, `setting`, and `value` parameters directly to `change_setting()`, which writes them into the `WPS_IC_SETTINGS` option without an allow-list. This makes it possible for unauthenticated attackers to write arbitrary permission keys into the plugin's settings, causing `wps_ic_users::checkAndAddCaps()` to grant any WordPress role \u2014 including Subscriber \u2014 the `manage_wpc_settings` capability and thereby achieve plugin-administrator-equivalent control over the plugin's optimization, CDN, and critical-CSS surfaces. The API key required to pass the authorization check can itself be obtained without authentication via the `wpc_send_critical_remote` nopriv AJAX action: when the external critical-CSS service returns an `apiResults` field, `initCritical()` echoes the stored plugin API key back to the caller in a `wp_send_json_success` response, completing the exploit chain entirely without a WordPress login."}], "title": "WP Compress <= 7.25.00 - Unauthenticated Privilege Escalation to 'group'/'setting'/'value' Parameters on comms Endpoint", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/67e9bfb8-b274-422a-a50d-a6b6b24bb193?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L49"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/users.class.php#L30"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L1042"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/ajax.class.php#L816"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/addons/criticalCss/criticalCss.php#L409"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3734610%40wp-compress-image-optimizer%2Ftags%2F7.26.00&old=3723132%40wp-compress-image-optimizer%2Ftags%2F7.25.00"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-269 Improper Privilege Management", "cweId": "CWE-269", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "baseScore": 4.8, "baseSeverity": "MEDIUM"}}], "credits": [{"lang": "en", "type": "finder", "value": "Wordfence PRISM"}], "timeline": [{"time": "2026-10-02T12:30:28.000Z", "lang": "en", "value": "Vendor Notified"}, {"time": "2026-10-15T17:35:06.000Z", "lang": "en", "value": "Disclosed"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-104755", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T14:55:02.789066Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:09:38.262Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-104755", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T14:55:02.789066Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T14:59:43.827Z"}}], "cna": {"title": "WP Compress <= 7.25.00 - Unauthenticated Privilege Escalation to 'group'/'setting'/'value' Parameters on comms Endpoint", "credits": [{"lang": "en", "type": "finder", "value": "Wordfence PRISM"}], "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 4.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"}}], "affected": [{"vendor": "aresit", "product": "WP Compress \u2013 Instant Performance & Speed Optimization", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "7.25.00"}], "defaultStatus": "unaffected"}], "timeline": [{"lang": "en", "time": "2026-10-02T12:30:28.000Z", "value": "Vendor Notified"}, {"lang": "en", "time": "2026-10-15T17:35:06.000Z", "value": "Disclosed"}], "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/67e9bfb8-b274-422a-a50d-a6b6b24bb193?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L49"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/users.class.php#L30"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L1042"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/ajax.class.php#L816"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/addons/criticalCss/criticalCss.php#L409"}, {"url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3734610%40wp-compress-image-optimizer%2Ftags%2F7.26.00&old=3723132%40wp-compress-image-optimizer%2Ftags%2F7.25.00"}], "descriptions": [{"lang": "en", "value": "The WP Compress \u2013 Instant Performance & Speed Optimization plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 7.25.00 The vulnerability exists because the `start_comms` dispatcher (`wps_ic_comms::start_comms`), hooked on every front-end request, gates access only by comparing the caller-supplied `apikey` parameter against the stored plugin API key with no WordPress capability check and no nonce verification, then passes the unvalidated `group`, `setting`, and `value` parameters directly to `change_setting()`, which writes them into the `WPS_IC_SETTINGS` option without an allow-list. This makes it possible for unauthenticated attackers to write arbitrary permission keys into the plugin's settings, causing `wps_ic_users::checkAndAddCaps()` to grant any WordPress role \u2014 including Subscriber \u2014 the `manage_wpc_settings` capability and thereby achieve plugin-administrator-equivalent control over the plugin's optimization, CDN, and critical-CSS surfaces. The API key required to pass the authorization check can itself be obtained without authentication via the `wpc_send_critical_remote` nopriv AJAX action: when the external critical-CSS service returns an `apiResults` field, `initCritical()` echoes the stored plugin API key back to the caller in a `wp_send_json_success` response, completing the exploit chain entirely without a WordPress login."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-269", "description": "CWE-269 Improper Privilege Management"}]}], "providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-10-16T06:41:04.957Z"}}}, "cveMetadata": {"cveId": "CVE-2026-104755", "state": "PUBLISHED", "dateUpdated": "2026-10-16T15:09:38.262Z", "dateReserved": "2026-10-02T12:15:34.261Z", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "datePublished": "2026-10-16T06:41:04.957Z", "assignerShortName": "Wordfence"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "WP Compress \u2013 Instant Performance & Speed Optimization", "vendor": "aresit", "versions": [{"lessThanOrEqual": "7.25.00", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@wordfence.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP Compress \u2013 Instant Performance & Speed Optimization plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 7.25.00 The vulnerability exists because the `start_comms` dispatcher (`wps_ic_comms::start_comms`), hooked on every front-end request, gates access only by comparing the caller-supplied `apikey` parameter against the stored plugin API key with no WordPress capability check and no nonce verification, then passes the unvalidated `group`, `setting`, and `value` parameters directly to `change_setting()`, which writes them into the `WPS_IC_SETTINGS` option without an allow-list. This makes it possible for unauthenticated attackers to write arbitrary permission keys into the plugin's settings, causing `wps_ic_users::checkAndAddCaps()` to grant any WordPress role \u2014 including Subscriber \u2014 the `manage_wpc_settings` capability and thereby achieve plugin-administrator-equivalent control over the plugin's optimization, CDN, and critical-CSS surfaces. The API key required to pass the authorization check can itself be obtained without authentication via the `wpc_send_critical_remote` nopriv AJAX action: when the external critical-CSS service returns an `apiResults` field, `initCritical()` echoes the stored plugin API key back to the caller in a `wp_send_json_success` response, completing the exploit chain entirely without a WordPress login."}], "id": "CVE-2026-104755", "lastModified": "2026-10-16T15:17:03.683", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 2.5, "source": "security@wordfence.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-104755", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T14:55:02.789066Z", "version": "2.0.3"}}]}, "published": "2026-10-16T07:17:08.413", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/addons/criticalCss/criticalCss.php#L409"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/ajax.class.php#L816"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L1042"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/comms.class.php#L49"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-compress-image-optimizer/tags/7.10.03/classes/users.class.php#L30"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/changeset?reponame=&new=3734610%40wp-compress-image-optimizer%2Ftags%2F7.26.00&old=3723132%40wp-compress-image-optimizer%2Ftags%2F7.25.00"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/67e9bfb8-b274-422a-a50d-a6b6b24bb193?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}], "source": "security@wordfence.com", "type": "Secondary"}]}

{}

{"created": "2026-10-16T13:24:28.022002+00:00", "updated": "2026-10-16T13:52:05.834943+00:00", "vendors": []}