{"id":"CVE-2026-111837","kind":"vulnerability","aliases":["CVE-2026-111837"],"related":[],"title":"Contest Gallery WordPress plugin: stored XSS through unsanitized input","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wasiliy Strecker Contest Gallery contest-gallery allows Stored XSS.This issue affects Contest Gallery: from n/a through 34.0.1.","summary":"Contest Gallery, a WordPress plugin by Wasiliy Strecker, fails to neutralize input before writing it into web pages, so it stores attacker-supplied script. A visitor whose browser loads the affected page can have script run in the context of the site.","severity":"medium","cvss":6.5,"epss":0.0018,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["contest-gallery","package","wordpress"],"not_affected_if":["plugin-not-installed"],"how_to_check":"- Check the installed version of the Contest Gallery plugin (contest-gallery) in the WordPress admin under Plugins, or in `wp-content/plugins/contest-gallery/`.\n- unknown for anything beyond the version range, as the sources do not give more detail.","fix":"- Update Contest Gallery (contest-gallery) to a version later than `34.0.1`; the sources do not name the first fixed release.\n- unknown for any interim workaround.","status":"open","published_at":"2026-10-21T15:17:15+00:00","first_seen_at":"2026-10-23T21:57:28+00:00","triaged_at":"2026-10-25T03:49:03+00:00","updated_at":"2026-10-25T03:49:03+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T03:49:03Z","model":"claude-haiku-5-5","output":{"fix":"- Update Contest Gallery (contest-gallery) to a version later than `34.0.1`; the sources do not name the first fixed release.\n- unknown for any interim workaround.","reach":"internet","title":"Contest Gallery WordPress plugin: stored XSS through unsanitized input","impact":"medium","summary":"Contest Gallery, a WordPress plugin by Wasiliy Strecker, fails to neutralize input before writing it into web pages, so it stores attacker-supplied script. A visitor whose browser loads the affected page can have script run in the context of the site.","category":"package","nicknames":[],"who_cares":["wordpress","contest-gallery"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker script runs in visitors' browsers on the affected site.","analyst_note":"Confirm the fixed version and whether the stored XSS needs an account to inject, using the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-111837.","how_to_check":"- Check the installed version of the Contest Gallery plugin (contest-gallery) in the WordPress admin under Plugins, or in `wp-content/plugins/contest-gallery/`.\n- unknown for anything beyond the version range, as the sources do not give more detail.","needs_analyst":true,"not_affected_if":["plugin-not-installed"],"who_is_affected":"Sites running the Contest Gallery plugin at version `34.0.1` or earlier are in the affected range. The sources do not describe which plugin features or configurations make a site exposed, so the exact data path is unknown. Sites that do not run this plugin can skip it.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00064,"input_tokens":3358,"output_tokens":609,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-111837':12A,15A '-2026':11A,14A '34.0.1':95C 'affect':52B,89C 'allow':85C 'attack':43B 'attacker-suppli':42B 'browser':49B 'contest':1A,17B,21B,80C,83C,90C 'contest-galleri':16B,82C 'context':60B 'cross':73C 'cross-sit':72C 'cve':10A,13A 'fail':29B 'galleri':2A,18B,22B,81C,84C,91C 'generat':71C 'improp':64C 'input':9A,32B,67C 'issu':88C 'load':50B 'n/a':93C 'neutral':31B,65C 'packag':19B 'page':38B,53B,70C 'plugin':4A,25B 'run':57B 'script':45B,56B,75C 'site':63B,74C 'store':5A,41B,86C 'strecker':28B,79C 'suppli':44B 'unsanit':8A 'visitor':47B 'vulner':76C 'wasiliy':27B,78C 'web':37B,69C 'whose':48B 'wordpress':3A,20B,24B 'write':34B 'xss':6A 'xss.this':87C","nicknames":[],"mitigations":[],"who_affected":"Sites running the Contest Gallery plugin at version `34.0.1` or earlier are in the affected range. The sources do not describe which plugin features or configurations make a site exposed, so the exact data path is unknown. Sites that do not run this plugin can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T15:17:15+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-2026-111837","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111837","severity":null,"published_at":"2026-10-21T15:17:15+00:00","modified_at":"2026-10-21T18:19:16+00:00","first_seen_at":"2026-10-23T21:57:28+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-111837","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111837","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:54+00:00","fetched_at":"2026-10-24T13:15:54+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"}