{"id":"CVE-2026-118800","kind":"vulnerability","aliases":["CVE-2026-118800"],"related":[],"title":"aBlocks WordPress plugin: stored script injection via headingTag parameter","description":"The aBlocks – Gutenberg Blocks, User Dashboard Builder, Popup Builder, Form Builder & Animation Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'headingTag' parameter in all versions up to, and including, 2.18.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.","summary":"The aBlocks WordPress plugin does not sanitize the headingTag parameter, so a logged-in contributor can save a page that runs scripts. The script then executes in the browser of any visitor who opens that page, including administrators.","severity":"medium","cvss":6.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ablocks","package","self-hosted","wordpress"],"not_affected_if":["no-contributor-accounts","plugin-not-installed"],"how_to_check":"- Check whether the aBlocks plugin is installed and its version in the WordPress admin under Plugins\n- Compare the installed version against `2.18.0`; versions up to and including `2.18.0` are affected","fix":null,"status":"open","published_at":"2026-11-07T07:17:03+00:00","first_seen_at":"2026-11-07T07:46:07+00:00","triaged_at":"2026-11-07T07:47:08+00:00","updated_at":"2026-11-07T07:47:08+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-07T07:47:08Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"aBlocks WordPress plugin: stored script injection via headingTag parameter","impact":"medium","summary":"The aBlocks WordPress plugin does not sanitize the headingTag parameter, so a logged-in contributor can save a page that runs scripts. The script then executes in the browser of any visitor who opens that page, including administrators.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","ablocks","self-hosted"],"confidence":0.7,"fix_status":"unknown","needs_auth":"yes","worst_case":"Scripts run in visitors' browsers, including administrators, stealing sessions","analyst_note":"","how_to_check":"- Check whether the aBlocks plugin is installed and its version in the WordPress admin under Plugins\n- Compare the installed version against `2.18.0`; versions up to and including `2.18.0` are affected","plain_action":"","needs_analyst":false,"not_affected_if":["plugin-not-installed","no-contributor-accounts"],"who_is_affected":"Sites running the aBlocks plugin up to and including version `2.18.0`. Exploitation needs a contributor-level account or higher, so sites with no untrusted contributors are at lower risk. Sites that do not run the plugin can skip it.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000679,"input_tokens":4318,"output_tokens":494,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-118800':12A,15A '-2026':11A,14A '2.18.0':96C 'ablock':1A,16B,23B,62C 'access':116C,132C 'administr':60B 'anim':72C 'arbitrari':121C 'attack':111C 'authent':110C 'block':64C 'browser':51B 'builder':67C,69C,71C,73C 'contributor':37B,114C 'contributor-level':113C 'cross':82C 'cross-sit':81C 'cve':10A,13A 'dashboard':66C 'due':97C 'escap':104C 'execut':48B,128C 'form':70C 'gutenberg':63C 'headingtag':8A,30B,87C 'host':20B 'includ':59B,95C 'inject':6A,120C,134C 'input':100C 'insuffici':99C 'level':115C 'log':35B 'logged-in':34B 'make':106C 'open':56B 'output':103C 'packag':17B 'page':41B,58B,125C,135C 'paramet':9A,31B,88C 'plugin':3A,25B,74C 'popup':68C 'possibl':108C 'run':43B 'sanit':28B,101C 'save':39B 'script':5A,44B,46B,84C,123C 'self':19B 'self-host':18B 'site':83C 'store':4A,80C 'user':65C,131C 'version':91C 'via':7A,85C 'visitor':54B 'vulner':78C 'web':122C 'whenev':129C 'wordpress':2A,21B,24B,76C","nicknames":[],"mitigations":[],"who_affected":"Sites running the aBlocks plugin up to and including version `2.18.0`. Exploitation needs a contributor-level account or higher, so sites with no untrusted contributors are at lower risk. Sites that do not run the plugin can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["ablocks","medium","package","selfhosted","wordpress"],"campaign_type":null,"search_a":"'-118800':12A,15A '-2026':11A,14A 'ablock':1A 'cve':10A,13A 'headingtag':8A 'inject':6A 'paramet':9A 'plugin':3A 'script':5A 'store':4A 'via':7A 'wordpress':2A","search_b":"'ablock':16B,23B 'administr':60B 'browser':51B 'contributor':37B 'execut':48B 'headingtag':30B 'host':20B 'includ':59B 'log':35B 'logged-in':34B 'open':56B 'packag':17B 'page':41B,58B 'paramet':31B 'plugin':25B 'run':43B 'sanit':28B 'save':39B 'script':44B,46B 'self':19B 'self-host':18B 'visitor':54B 'wordpress':21B,24B","search_c":"'2.18.0':96C 'ablock':62C 'access':116C,132C 'anim':72C 'arbitrari':121C 'attack':111C 'authent':110C 'block':64C 'builder':67C,69C,71C,73C 'contributor':114C 'contributor-level':113C 'cross':82C 'cross-sit':81C 'dashboard':66C 'due':97C 'escap':104C 'execut':128C 'form':70C 'gutenberg':63C 'headingtag':87C 'includ':95C 'inject':120C,134C 'input':100C 'insuffici':99C 'level':115C 'make':106C 'output':103C 'page':125C,135C 'paramet':88C 'plugin':74C 'popup':68C 'possibl':108C 'sanit':101C 'script':84C,123C 'site':83C 'store':80C 'user':65C,131C 'version':91C 'via':85C 'vulner':78C 'web':122C 'whenev':129C 'wordpress':76C","first_public_at":"2026-11-07T07:17:03+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118800","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118800","severity":null,"published_at":"2026-11-07T07:17:03+00:00","modified_at":"2026-11-07T07:17:03+00:00","first_seen_at":"2026-11-07T07:46:07+00:00","fetched_at":"2026-11-07T07:46:07+00:00","note":null}],"documents":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}