{"id":55506,"date":"2026-05-19T08:17:19","date_gmt":"2026-05-19T08:17:19","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=55506"},"modified":"2026-05-19T08:17:19","modified_gmt":"2026-05-19T08:17:19","slug":"contest-gallery-2816-unauthenticated-sql-injection","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=55506","title":{"rendered":"Contest Gallery <= 28.1.6 - Unauthenticated SQL Injection_CVE-2026-8912"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;The Contest Gallery plugin for WordPress is vulnerable to SQL Injection via the &#8216;form_input&#8217; parameter in versions up to, and including, 28.1.6. This is due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query inside the unauthenticated &#8216;post_cg_gallery_form_upload&#8217; AJAX action (specifically the &#8216;cb&#8217; branch of the included users-upload-check.php, where $f_input_id is concatenated unquoted into &#8216;SELECT Field_Content FROM &#8230; WHERE id = $f_input_id&#8217;). The endpoint is gated only by a public frontend nonce (&#8216;cg1l_action&#8217; \/ &#8216;cg_nonce&#8217;) that is exposed in the page source of any public gallery page. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.&#8221;,&#8221;published&#8221;:&#8221;2026-05-19T11:18:46.737Z&#8221;,&#8221;modified&#8221;:&#8221;2026-05-19T11:18:46.737Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;Contest Gallery \\u003c= 28.1.6 &#8211; Unauthenticated SQL Injection&#8221;,&#8221;source&#8221;:&#8221;Wordfence&#8221;,&#8221;references&#8221;:&#8221;https:\/\/www.wordfence.com\/threat-intel\/vulnerabilities\/id\/71f2f8c4-00ee-4ab4-b0e0-9ddac46818b3?source=cve\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/contest-gallery\/tags\/28.1.5\/v10\/v10-frontend\/user_upload\/users-upload-check.php#L1193\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/contest-gallery\/tags\/28.1.5\/v10\/v10-frontend\/user_upload\/users-upload-check.php#L1036\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/contest-gallery\/tags\/28.1.5\/ajax\/ajax-functions-frontend.php#L837\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/contest-gallery\/tags\/28.1.5\/functions\/frontend\/cg-general-frontend.php#L12&#8243;,&#8221;id&#8221;:&#8221;CVE-2026-8912&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-89&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;contest-gallery Contest Gallery \u2013 Upload \\u0026 Vote Photos, Media, Sell with PayPal \\u0026 Stripe 0&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:7.5,&#8221;severity&#8221;:&#8221;HIGH&#8221;,&#8221;vector&#8221;:&#8221;CVSS:3.1\/AV:N\/AC:L\/PR:N\/UI:N\/S:U\/C:H\/I:N\/A:N&#8221;,&#8221;version&#8221;:&#8221;3.1&#8243;},&#8221;cvss2&#8243;:{},&#8221;cvss3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;,&#8221;cvssV3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;}},&#8221;href&#8221;:&#8221;&#8221;,&#8221;category_name&#8221;:&#8221;CVE&#8221;,&#8221;post_link&#8221;:&#8221;&#8221;,&#8221;product&#8221;:&#8221;Contest Gallery \u2013 Upload \\u0026 Vote Photos, Media, Sell with PayPal \\u0026 Stripe&#8221;,&#8221;version&#8221;:&#8221;0&#8243;,&#8221;vendor&#8221;:&#8221;contest-gallery&#8221;,&#8221;ai_description&#8221;:&#8221;&#8221;,&#8221;ai_severity&#8221;:&#8221;&#8221;,&#8221;ai_vendor&#8221;:&#8221;&#8221;,&#8221;ai_product&#8221;:&#8221;&#8221;,&#8221;ai_version&#8221;:&#8221;&#8221;,&#8221;ai_score&#8221;:0}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;The Contest Gallery plugin for WordPress is vulnerable to SQL Injection via the &#8216;form_input&#8217; parameter in versions up to, and including, 28.1.6. This is due&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,16,12,15,13,7,11,5],"class_list":["post-55506","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-75","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Contest Gallery<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=55506\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Contest Gallery\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;The Contest Gallery plugin for WordPress is vulnerable to SQL Injection via the &#8216;form_input&#8217; parameter in versions up to, and including, 28.1.6. 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