{"answers":{"affected":"2 open source packages ship an affected version, including winter/wn-backend-module.","exploited":"There is no known exploitation of CVE-2026-32257 in the wild and no public exploit code.","fix":"Upgrade winter/wn-backend-module to 1.2.13 or later.","what":"CVE-2026-32257 is a high-severity cross-site scripting vulnerability in wintercms winter, published on 26 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-32257 and fix it if it is affected.\n\nWhat it is: CVE-2026-32257 is a high-severity cross-site scripting vulnerability in wintercms winter, published on 26 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-32257 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- winter/wn-backend-module (Packagist): affected all versions; fixed in 1.2.13\n- winter/wn-backend-module (Packagist): affected all versions; fixed in 1.2.13\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-32257/ (Markdown: https://insights.sbomify.com/CVE-2026-32257/index.md)","id":"CVE-2026-32257","markdown":"https://insights.sbomify.com/CVE-2026-32257/index.md","name":"CVE-2026-32257","record":{"aliases":["GHSA-v7cf-8gh9-gxmj"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Winter CMS","requires_auth":"high_privilege","summary":"Stored XSS in Winter CMS allows backend users to inject malicious scripts via custom styles, potentially compromising other backend users.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Prior to 1.2.13, custom CSS supplied through the Brand Settings Styles field by a backend user with the backend.manage_branding permission is compiled by the LESS parser and rendered without sanitization on every backend page, allowing stored cross-site scripting against backend users. This issue is fixed in version 1.2.13.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Winter: Stored XSS through Brand Settings custom styles","id":"CVE-2026-32257","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":2,"next":{"headline":"Winter: Stored XSS through Editor Settings custom styles","id":"CVE-2026-32258"},"packages":[{"ecosystem":"Packagist","fixed":["1.2.13"],"introduced":["0"],"last_affected":[],"package":"winter/wn-backend-module","purl":null,"source":"GHSA-v7cf-8gh9-gxmj"},{"ecosystem":"Packagist","fixed":["1.2.13"],"introduced":["0"],"last_affected":[],"package":"winter/wn-backend-module","purl":"pkg:composer/winter/wn-backend-module","source":"GHSA-v7cf-8gh9-gxmj"}],"prev":{"headline":"music-metadata has an infinite loop vulnerability in ASF parser","id":"CVE-2026-32256"},"products":["winter"],"published":"2026-08-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-27","vendors":["wintercms"]},"summary":"Stored XSS in Winter CMS allows backend users to inject malicious scripts via custom styles, potentially compromising other backend users.","url":"https://insights.sbomify.com/CVE-2026-32257/"}