{"id":"CVE-2026-116552","kind":"vulnerability","aliases":["CVE-2026-116552"],"related":[],"title":"LikeBtn WordPress plugin: client-IP header lets attackers inject stored scripts","description":"The Like Button Rating ♥ LikeBtn plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'HTTP_CLIENT_IP (Client-IP header)' parameter in all versions up to, and including, 2.6.64 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires the site administrator to have disabled the default 'Be GDPR compliant' option, which would otherwise hash stored IP values and neutralize the payload. Successful exploitation additionally requires an action by an administrator — the attacker cannot trigger the vulnerability on their own.","summary":"The Like Button Rating LikeBtn plugin for WordPress stores the HTTP_CLIENT_IP header without sanitizing it and outputs it unescaped. An unauthenticated attacker can plant JavaScript that runs in the browser of anyone who opens an affected page, including administrators.","severity":"medium","cvss":4.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["likebtn","package","self-hosted","wordpress"],"not_affected_if":["gdpr-option-enabled","plugin-not-installed"],"how_to_check":"- Check whether the LikeBtn plugin is installed and its version is `2.6.64` or lower in the WordPress plugin list.\n- Check whether the 'Be GDPR compliant' option is turned off in the LikeBtn settings.","fix":"- Versions up to and including `2.6.64` are affected; the sources do not name a fixed version.","status":"open","published_at":"2026-10-30T18:17:23+00:00","first_seen_at":"2026-10-30T18:55:29+00:00","triaged_at":"2026-10-30T18:57:13+00:00","updated_at":"2026-10-30T18:57:13+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-10-30T18:57:13Z","model":"claude-haiku-5-5","output":{"fix":"- Versions up to and including `2.6.64` are affected; the sources do not name a fixed version.","reach":"internet","title":"LikeBtn WordPress plugin: client-IP header lets attackers inject stored scripts","impact":"medium","summary":"The Like Button Rating LikeBtn plugin for WordPress stores the HTTP_CLIENT_IP header without sanitizing it and outputs it unescaped. An unauthenticated attacker can plant JavaScript that runs in the browser of anyone who opens an affected page, including administrators.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","likebtn","self-hosted"],"confidence":0.8,"fix_status":"unknown","needs_auth":"no","worst_case":"Injected scripts run in visitors' and administrators' browsers on the site.","analyst_note":"","how_to_check":"- Check whether the LikeBtn plugin is installed and its version is `2.6.64` or lower in the WordPress plugin list.\n- Check whether the 'Be GDPR compliant' option is turned off in the LikeBtn settings.","plain_action":"","needs_analyst":false,"not_affected_if":["plugin-not-installed","gdpr-option-enabled"],"who_is_affected":"Sites running the LikeBtn plugin at version 2.6.64 or lower where the 'Be GDPR compliant' option is disabled. Exploitation also needs an administrator to act, so sites without the plugin or with the GDPR option enabled are not exposed.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000713,"input_tokens":4291,"output_tokens":568,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116552':15A,18A '-2026':14A,17A '2.6.64':99C 'access':128C 'action':163C 'addit':160C 'administr':65B,137C,166C 'affect':62B 'anyon':58B 'arbitrari':117C 'attack':9A,48B,114C,168C 'browser':56B 'button':27B,68C 'cannot':169C 'client':5A,36B,85C,88C 'client-ip':4A,87C 'compliant':145C 'cross':79C 'cross-sit':78C 'cve':13A,16A 'default':142C 'disabl':140C 'due':100C 'escap':107C 'execut':124C 'exploit':133C,159C 'gdpr':144C 'hash':150C 'header':7A,38B,90C 'host':23B 'http':35B,84C 'includ':64B,98C 'inject':10A,116C,130C 'input':103C 'insuffici':102C 'ip':6A,37B,86C,89C,152C 'javascript':51B 'let':8A 'like':26B,67C 'likebtn':1A,19B,29B,70C 'make':109C 'neutral':155C 'open':60B 'option':146C 'otherwis':149C 'output':43B,106C 'packag':20B 'page':63B,121C,131C 'paramet':91C 'payload':157C 'plant':50B 'plugin':3A,30B,71C 'possibl':111C 'rate':28B,69C 'requir':134C,161C 'run':53B 'sanit':40B,104C 'script':12A,81C,119C 'self':22B 'self-host':21B 'site':80C,136C 'store':11A,33B,77C,151C 'success':132C,158C 'trigger':170C 'unauthent':47B,113C 'unescap':45B 'user':127C 'valu':153C 'version':94C 'via':82C 'vulner':75C,172C 'web':118C 'whenev':125C 'without':39B 'wordpress':2A,24B,32B,73C 'would':148C","nicknames":[],"mitigations":[],"who_affected":"Sites running the LikeBtn plugin at version 2.6.64 or lower where the 'Be GDPR compliant' option is disabled. Exploitation also needs an administrator to act, so sites without the plugin or with the GDPR option enabled are not exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"first_public_at":"2026-10-30T18:17:23+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116552","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116552","severity":null,"published_at":"2026-10-30T18:17:23+00:00","modified_at":"2026-10-30T18:33:26+00:00","first_seen_at":"2026-10-30T18:55:29+00:00","fetched_at":"2026-10-30T18:55:29+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"}