{"id":"CVE-2026-110039","kind":"vulnerability","aliases":["CVE-2026-110039"],"related":[],"title":"Smush WordPress plugin: site admins can change network-wide settings on multisite","description":"The Smush  WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.","summary":"Before version 4.3.4, the Smush WordPress plugin lets an administrator of a single site on a multisite network change a network-wide access setting that should only be changed by network administrators. The change then applies to the entire network.","severity":"low","cvss":2.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["multisite","package","smush","wordpress"],"not_affected_if":["plugin-not-installed","plugin-version-4.3.4-or-later","single-site"],"how_to_check":"- Check the installed Smush version in the WordPress plugins screen or with `wp plugin get wp-smushit --field=version`\n- Check whether the install is a multisite network with `wp core is-installed --network`","fix":"- Update the Smush plugin to `4.3.4` or later","status":"open","published_at":"2026-10-16T07:17:10+00:00","first_seen_at":"2026-10-23T21:57:12+00:00","triaged_at":"2026-10-25T04:48:08+00:00","updated_at":"2026-10-25T04:48:08+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:48:08Z","model":"claude-haiku-5-5","output":{"fix":"- Update the Smush plugin to `4.3.4` or later","reach":"network","title":"Smush WordPress plugin: site admins can change network-wide settings on multisite","impact":"low","summary":"Before version 4.3.4, the Smush WordPress plugin lets an administrator of a single site on a multisite network change a network-wide access setting that should only be changed by network administrators. The change then applies to the entire network.","category":"package","nicknames":[],"who_cares":["wordpress","multisite","smush"],"confidence":0.6,"needs_auth":"yes","worst_case":"a site admin changes a network-wide Smush setting for every site","analyst_note":"","how_to_check":"- Check the installed Smush version in the WordPress plugins screen or with `wp plugin get wp-smushit --field=version`\n- Check whether the install is a multisite network with `wp core is-installed --network`","needs_analyst":false,"not_affected_if":["single-site","plugin-not-installed","plugin-version-4.3.4-or-later"],"who_is_affected":"Sites running the Smush plugin on a WordPress multisite network, where individual site administrators exist alongside network administrators. Single-site WordPress installs are not affected by this privilege issue.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000558,"input_tokens":3285,"output_tokens":459,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-110039':16A,19A '-2026':15A,18A '4.3.4':26B,70C 'access':47B,80C 'admin':5A 'administr':33B,56B,84C,87C 'allow':85C 'appli':60B 'chang':7A,42B,53B,58B,74C,97C 'cve':14A,17A 'entir':63B,101C 'let':31B 'multisit':13A,20B,40B,94C 'network':9A,41B,45B,55B,64B,78C,83C,95C,102C 'network-wid':8A,44B,77C 'packag':21B 'plugin':3A,30B,68C 'restrict':73C 'set':11A,48B,81C 'singl':36B,90C 'site':4A,37B,91C 'smush':1A,22B,28B,66C 'version':25B 'wide':10A,46B,79C 'wordpress':2A,23B,29B,67C","nicknames":[],"mitigations":[],"who_affected":"Sites running the Smush plugin on a WordPress multisite network, where individual site administrators exist alongside network administrators. Single-site WordPress installs are not affected by this privilege issue.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T07:17:10+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-110039","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110039","severity":null,"published_at":"2026-10-16T07:17:10+00:00","modified_at":"2026-10-16T15:17:09+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"}