{"id":"CVE-2026-81344","kind":"vulnerability","aliases":["CVE-2026-81344"],"related":[],"title":"ACF Frontend Admin WordPress plugin: unrestricted PHP object deserialization enables code execution","description":"The ACF Frontend Admin by DynamiApps WordPress plugin through 3.29.13 does not restrict which PHP classes may be instantiated when it deserialises stored post content that is rendered on public-facing pages, allowing high-privilege users such as administrators to inject a PHP object which, given a suitable POP chain in another installed ACF Frontend Admin by DynamiApps WordPress plugin through 3.29.13 or in WordPress core, can be leveraged to achieve remote code execution.","summary":"The ACF Frontend Admin by DynamiApps WordPress plugin through 3.29.13 deserialises stored post content rendered on public pages without restricting which PHP classes it instantiates. An administrator can inject a PHP object that, combined with a suitable POP chain in this plugin or WordPress core, can lead to remote code execution.","severity":"medium","cvss":6.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","self-hosted","wordpress","wordpress-plugins"],"not_affected_if":["plugin-not-installed","plugin-updated"],"how_to_check":"- Check the installed version of ACF Frontend Admin by DynamiApps in the WordPress plugins screen or `wp plugin get acf-frontend-display --field=version` (plugin slug unknown; verify in the sources)\n- Look for the plugin version `3.29.13` or earlier\n- unknown whether the sources name a specific file or setting to inspect","fix":"- Update ACF Frontend Admin by DynamiApps to a version later than `3.29.13`; the fixed version is unknown from the sources\n- Until patched, restrict Administrator accounts to trusted users only","status":"open","published_at":"2026-10-17T06:16:33+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","triaged_at":"2026-10-25T03:47:02+00:00","updated_at":"2026-10-25T03:47:02+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:47:02Z","model":"claude-haiku-5-5","output":{"fix":"- Update ACF Frontend Admin by DynamiApps to a version later than `3.29.13`; the fixed version is unknown from the sources\n- Until patched, restrict Administrator accounts to trusted users only","reach":"internet","title":"ACF Frontend Admin WordPress plugin: unrestricted PHP object deserialization enables code execution","impact":"high","summary":"The ACF Frontend Admin by DynamiApps WordPress plugin through 3.29.13 deserialises stored post content rendered on public pages without restricting which PHP classes it instantiates. An administrator can inject a PHP object that, combined with a suitable POP chain in this plugin or WordPress core, can lead to remote code execution.","category":"package","nicknames":[],"who_cares":["wordpress","wordpress-plugins","self-hosted"],"confidence":0.6,"needs_auth":"yes","worst_case":"Remote code execution on the web server via injected PHP object","analyst_note":"Find the fixed plugin version and the plugin slug on the NVD entry or the vendor changelog, and check whether a usable POP chain is public.","how_to_check":"- Check the installed version of ACF Frontend Admin by DynamiApps in the WordPress plugins screen or `wp plugin get acf-frontend-display --field=version` (plugin slug unknown; verify in the sources)\n- Look for the plugin version `3.29.13` or earlier\n- unknown whether the sources name a specific file or setting to inspect","needs_analyst":true,"not_affected_if":["plugin-not-installed","plugin-updated"],"who_is_affected":"Sites running ACF Frontend Admin by DynamiApps through 3.29.13 are affected, because the flaw sits in how the plugin reads stored post content shown on public pages. The exploit needs a high-privilege account such as an administrator to write the payload, and a suitable POP chain in this plugin or WordPress core to finish it. Sites without this plugin installed can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000698,"input_tokens":3393,"output_tokens":718,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-81344':15A,18A '3.29.13':36B,87C,141C 'acf':1A,28B,79C,133C 'achiev':150C 'admin':3A,30B,81C,135C 'administr':53B,118C 'allow':111C 'anoth':131C 'chain':65B,129C 'class':49B,93C 'code':11A,76B,152C 'combin':60B 'content':40B,102C 'core':71B,145C 'cve':13A,16A 'deseri':9A 'deserialis':37B,99C 'dynamiapp':32B,83C,137C 'enabl':10A 'execut':12A,77B,153C 'face':109C 'frontend':2A,29B,80C,134C 'given':125C 'high':113C 'high-privileg':112C 'host':22B 'inject':55B,120C 'instal':132C 'instanti':51B,96C 'lead':73B 'leverag':148C 'may':94C 'object':8A,58B,123C 'packag':19B 'page':44B,110C 'php':7A,48B,57B,92C,122C 'plugin':5A,26B,34B,68B,85C,139C 'pop':64B,128C 'post':39B,101C 'privileg':114C 'public':43B,108C 'public-fac':107C 'remot':75B,151C 'render':41B,105C 'restrict':46B,90C 'self':21B 'self-host':20B 'store':38B,100C 'suitabl':63B,127C 'unrestrict':6A 'user':115C 'without':45B 'wordpress':4A,23B,25B,33B,70B,84C,138C,144C 'wordpress-plugin':24B","nicknames":[],"mitigations":[],"who_affected":"Sites running ACF Frontend Admin by DynamiApps through 3.29.13 are affected, because the flaw sits in how the plugin reads stored post content shown on public pages. The exploit needs a high-privilege account such as an administrator to write the payload, and a suitable POP chain in this plugin or WordPress core to finish it. Sites without this plugin installed can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-17T06:16:33+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-81344","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81344","severity":null,"published_at":"2026-10-17T06:16:33+00:00","modified_at":"2026-10-19T21:04:50+00:00","first_seen_at":"2026-10-23T21:57:14+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}