{"id":"CVE-2026-121773","kind":"vulnerability","aliases":["CVE-2026-121773"],"related":[],"title":"GenerateBlocks WordPress plugin: stored XSS through version 2.5.0","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in GeneratePress GenerateBlocks generateblocks allows Stored XSS.This issue affects GenerateBlocks: from n/a through 2.5.0.","summary":"GenerateBlocks, a WordPress block plugin by GeneratePress, fails to neutralize input when generating pages, so stored cross-site scripting is possible. An attacker who can store content on the site can run scripts in other visitors' browsers.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"GenerateBlocks","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["generateblocks","package","self-hosted","wordpress"],"not_affected_if":["plugin-not-installed","trusted-editors-only"],"how_to_check":"- Check the installed GenerateBlocks plugin version in the WordPress admin under Plugins, or with `wp plugin get generateblocks --field=version`\n- Compare against the affected range: all versions through `2.5.0`","fix":"- GenerateBlocks: a fixed version is not stated in the sources; unknown","status":"open","published_at":"2026-11-11T12:19:35+00:00","first_seen_at":"2026-11-11T12:27:10+00:00","triaged_at":"2026-11-11T12:28:37+00:00","updated_at":"2026-11-11T12:28:37+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-11T12:28:37Z","model":"claude-haiku-5-5","output":{"fix":"- GenerateBlocks: a fixed version is not stated in the sources; unknown","reach":"internet","title":"GenerateBlocks WordPress plugin: stored XSS through version 2.5.0","impact":"medium","summary":"GenerateBlocks, a WordPress block plugin by GeneratePress, fails to neutralize input when generating pages, so stored cross-site scripting is possible. An attacker who can store content on the site can run scripts in other visitors' browsers.","audience":"businesses","category":"package","nicknames":[],"who_cares":["wordpress","generateblocks","self-hosted"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Scripts run in visitors' browsers, enabling session theft or admin takeover","analyst_note":"Confirm the fixed version and whether author-level access is required, using the NVD entry and the WordPress plugin changelog.","how_to_check":"- Check the installed GenerateBlocks plugin version in the WordPress admin under Plugins, or with `wp plugin get generateblocks --field=version`\n- Compare against the affected range: all versions through `2.5.0`","plain_action":"","product_name":"GenerateBlocks","needs_analyst":true,"not_affected_if":["plugin-not-installed","trusted-editors-only"],"who_is_affected":"Sites running the GenerateBlocks WordPress plugin at version 2.5.0 or earlier are in the affected range. The risk depends on who can save content to the site; sites where only trusted editors write content carry less exposure. Sites that do not run this plugin can skip it.","user_interaction":"yes","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00076,"input_tokens":4551,"output_tokens":610,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-121773':11A,14A '-2026':10A,13A '2.5.0':8A,86C 'affect':81C 'allow':77C 'attack':45B 'block':25B 'browser':59B 'content':49B 'cross':39B,69C 'cross-sit':38B,68C 'cve':9A,12A 'fail':29B 'generat':34B,67C 'generateblock':1A,16B,22B,75C,76C,82C 'generateblocks':15A 'generatepress':28B,74C 'host':20B 'improp':60C 'input':32B,63C 'issu':80C 'n/a':84C 'neutral':31B,61C 'packag':17B 'page':35B,66C 'plugin':3A,26B 'possibl':43B 'run':54B 'script':41B,55B,71C 'self':19B 'self-host':18B 'site':40B,52B,70C 'store':4A,37B,48B,78C 'version':7A 'visitor':58B 'vulner':72C 'web':65C 'wordpress':2A,21B,24B 'xss':5A 'xss.this':79C","nicknames":[],"mitigations":[],"who_affected":"Sites running the GenerateBlocks WordPress plugin at version 2.5.0 or earlier are in the affected range. The risk depends on who can save content to the site; sites where only trusted editors write content carry less exposure. Sites that do not run this plugin can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":["generateblocks"],"ptokens":["generateblocks"],"labels":["generateblocks","medium","package","selfhosted","vendor","wordpress"],"campaign_type":null,"search_a":"'-121773':11A,14A '-2026':10A,13A '2.5.0':8A 'cve':9A,12A 'generateblock':1A 'generateblocks':15A 'plugin':3A 'store':4A 'version':7A 'wordpress':2A 'xss':5A","search_b":"'attack':45B 'block':25B 'browser':59B 'content':49B 'cross':39B 'cross-sit':38B 'fail':29B 'generat':34B 'generateblock':16B,22B 'generatepress':28B 'host':20B 'input':32B 'neutral':31B 'packag':17B 'page':35B 'plugin':26B 'possibl':43B 'run':54B 'script':41B,55B 'self':19B 'self-host':18B 'site':40B,52B 'store':37B,48B 'visitor':58B 'wordpress':21B,24B","search_c":"'2.5.0':86C 'affect':81C 'allow':77C 'cross':69C 'cross-sit':68C 'generat':67C 'generateblock':75C,76C,82C 'generatepress':74C 'improp':60C 'input':63C 'issu':80C 'n/a':84C 'neutral':61C 'page':66C 'script':71C 'site':70C 'store':78C 'vulner':72C 'web':65C 'xss.this':79C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T12:19:35+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","cvss_by":"audit@patchstack.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121773","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121773","severity":null,"published_at":"2026-11-11T12:19:35+00:00","modified_at":"2026-11-11T12:19:35+00:00","first_seen_at":"2026-11-11T12:27:10+00:00","fetched_at":"2026-11-11T12:27:10+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}