{"id":"CVE-2026-111122","kind":"vulnerability","aliases":["CVE-2026-111122"],"related":[],"title":"SiteOrigin CSS WordPress plugin: stored XSS via href lets attackers run scripts","description":"The SiteOrigin CSS plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'href' parameter in all versions up to, and including, 1.6.7 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 malicious comment to be approved and an administrator to subsequently open the Visual Inspector and click the attacker's anchor link, both of which are plausible interactions during routine comment triage.","summary":"The SiteOrigin CSS plugin for WordPress fails to sanitize the 'href' parameter, so injected content is stored and later rendered as script in pages. An unauthenticated attacker can plant a script through a comment that an administrator approves and then clicks in the Visual Inspector, which runs script in the admin's browser.","severity":"high","cvss":7.2,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["package","siteorigin-css","wordpress","wordpress-plugin"],"not_affected_if":["plugin-not-installed","plugin-updated-past-1.6.7"],"how_to_check":"- Check the installed SiteOrigin CSS plugin version in the WordPress Plugins screen or with `wp plugin get so-css --field=version`\n- Confirm whether the plugin is active with `wp plugin list --status=active`","fix":"- Update SiteOrigin CSS to a version later than `1.6.7`, as the sources state all versions up to and including `1.6.7` are affected\n- unknown whether a patched version number is listed in the sources","status":"open","published_at":"2026-10-16T06:17:09+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","triaged_at":"2026-10-25T03:29:46+00:00","updated_at":"2026-10-25T03:29:46+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T03:29:46Z","model":"claude-haiku-5-5","output":{"fix":"- Update SiteOrigin CSS to a version later than `1.6.7`, as the sources state all versions up to and including `1.6.7` are affected\n- unknown whether a patched version number is listed in the sources","reach":"internet","title":"SiteOrigin CSS WordPress plugin: stored XSS via href lets attackers run scripts","impact":"medium","summary":"The SiteOrigin CSS plugin for WordPress fails to sanitize the 'href' parameter, so injected content is stored and later rendered as script in pages. An unauthenticated attacker can plant a script through a comment that an administrator approves and then clicks in the Visual Inspector, which runs script in the admin's browser.","category":"package","nicknames":[],"who_cares":["wordpress","wordpress-plugin","siteorigin-css"],"confidence":0.7,"needs_auth":"no","worst_case":"Script runs in an administrator's browser session on the site","analyst_note":"Confirm the patched version number and the exact so-css slug at https://nvd.nist.gov/vuln/detail/CVE-2026-111122 and the plugin's WordPress.org changelog.","how_to_check":"- Check the installed SiteOrigin CSS plugin version in the WordPress Plugins screen or with `wp plugin get so-css --field=version`\n- Confirm whether the plugin is active with `wp plugin list --status=active`","needs_analyst":true,"not_affected_if":["plugin-not-installed","plugin-updated-past-1.6.7"],"who_is_affected":"Sites running the SiteOrigin CSS plugin at version `1.6.7` or earlier are exposed. Exploitation depends on comment approval and an administrator interacting with the Visual Inspector, so sites that do not run the plugin or that have already updated can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000671,"input_tokens":3435,"output_tokens":655,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-111122':15A,18A '-2026':14A,17A '1.6.7':108C 'access':137C 'admin':77B 'administr':63B,152C 'anchor':164C 'approv':64B,149C 'arbitrari':126C 'attack':10A,53B,123C,162C 'base':92C 'browser':79B 'click':67B,160C 'comment':60B,146C,174C 'content':41B 'cross':94C 'cross-sit':93C 'css':2A,22B,29B,82C 'cve':13A,16A 'dom':91C 'dom-bas':90C 'due':109C 'escap':116C 'execut':133C 'exploit':142C 'fail':33B 'href':8A,37B,99C 'includ':107C 'inject':40B,125C,139C 'input':112C 'inspector':71B,158C 'insuffici':111C 'interact':171C 'later':45B 'let':9A 'link':165C 'make':118C 'malici':145C 'open':155C 'output':115C 'packag':19B 'page':50B,130C,140C 'paramet':38B,100C 'plant':55B 'plausibl':170C 'plugin':4A,26B,30B,83C 'possibl':120C 'render':46B 'requir':143C 'routin':173C 'run':11A,73B 'sanit':35B,113C 'script':12A,48B,57B,74B,96C,128C 'site':95C 'siteorigin':1A,21B,28B,81C 'siteorigin-css':20B 'store':5A,43B,89C 'subsequ':154C 'success':141C 'triag':175C 'unauthent':52B,122C 'user':136C 'version':103C 'via':7A,97C 'visual':70B,157C 'vulner':87C 'web':127C 'whenev':134C 'wordpress':3A,23B,25B,32B,85C 'wordpress-plugin':24B 'xss':6A","nicknames":[],"mitigations":[],"who_affected":"Sites running the SiteOrigin CSS plugin at version `1.6.7` or earlier are exposed. Exploitation depends on comment approval and an administrator interacting with the Visual Inspector, so sites that do not run the plugin or that have already updated can skip it.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T06:17:09+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","cvss_by":"security@wordfence.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111122","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111122","severity":null,"published_at":"2026-10-16T06:17:09+00:00","modified_at":"2026-10-16T15:17:13+00:00","first_seen_at":"2026-10-23T21:57:12+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"}