{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-3763 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2018-3763 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-3763 is a medium-severity cross-site scripting vulnerability in Nextcloud Calendar application, published on 5 Jul 2018. 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-2018-3763 and fix it if it is affected.\n\nWhat it is: CVE-2018-3763 is a medium-severity cross-site scripting vulnerability in Nextcloud Calendar application, published on 5 Jul 2018. 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-2018-3763 in the wild and no public exploit code.\n\nAffected product: Nextcloud Calendar application. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2018-3763/ (Markdown: https://insights.sbomify.com/CVE-2018-3763/index.md)","id":"CVE-2018-3763","markdown":"https://insights.sbomify.com/CVE-2018-3763/index.md","name":"CVE-2018-3763","record":{"aliases":["GHSA-5pqm-hfmj-g8jg"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Nextcloud Calendar app","requires_auth":"high_privilege","summary":"Privileged users can inject malicious scripts into group names, leading to stored XSS attacks against other users in Nextcloud Calendar.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"calendar","vendor":"nextcloud"}],"cvss":{"score":4.8,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"In Nextcloud Calendar before 1.5.8 and 1.6.1, a missing sanitization of search results for an autocomplete field could lead to a stored XSS requiring user-interaction. The missing sanitization only affected group names, hence malicious search results could only be crafted by privileged users like admins or group admins.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Cross-site scripting in Nextcloud Calendar application","id":"CVE-2018-3763","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2018"},"n_packages":0,"n_references":1,"next":{"headline":"Cross-site scripting in Nextcloud Contacts application","id":"CVE-2018-3764"},"packages":[],"prev":{"headline":"Missing authorization in Nextcloud Server","id":"CVE-2018-3762"},"products":["Nextcloud Calendar application"],"published":"2018-07-05","related":[{"cvss_score":5.7,"headline":"Nextcloud Calendar attachments of local files are offered to downloaded","id":"CVE-2025-66550","kev_date_added":null,"published":"2025-12-05"},{"cvss_score":5.3,"headline":"Command Injection in Appointment Emails for Nextcloud Calendar","id":"CVE-2022-24838","kev_date_added":null,"published":"2022-04-11"},{"cvss_score":4.8,"headline":"Nextcloud Calendar app used predictable proposal participant tokens","id":"CVE-2025-66511","kev_date_added":null,"published":"2025-12-05"},{"cvss_score":4.6,"headline":"Nextcloud Calendar's event create can create attachments that link to other websites","id":"CVE-2024-37316","kev_date_added":null,"published":"2024-06-14"},{"cvss_score":4.3,"headline":"Nextcloud: Calendar app leaked user identifiers via attendee suggestion endpoint","id":"CVE-2026-45286","kev_date_added":null,"published":"2026-06-01"},{"cvss_score":4.3,"headline":"Inviting excessive long email addresses to a calendar event makes the Nextcloud server unresponsive","id":"CVE-2023-45150","kev_date_added":null,"published":"2023-10-16"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["Nextcloud"]},"summary":"Privileged users can inject malicious scripts into group names, leading to stored XSS attacks against other users in Nextcloud Calendar.","url":"https://insights.sbomify.com/CVE-2018-3763/"}