{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-54221 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-54221 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-54221 is a medium-severity cross-site scripting vulnerability in UBB.threads, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-54221 and fix it if it is affected.\n\nWhat it is: CVE-2026-54221 is a medium-severity cross-site scripting vulnerability in UBB.threads, published on 18 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-54221 in the wild and no public exploit code.\n\nAffected product: UBB.threads. 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-2026-54221/ (Markdown: https://insights.sbomify.com/CVE-2026-54221/index.md)","id":"CVE-2026-54221","markdown":"https://insights.sbomify.com/CVE-2026-54221/index.md","name":"CVE-2026-54221","record":{"aliases":["GHSA-9c46-2jjw-rj67"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"UBB.threads forum","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in victims' browsers via crafted links in UBB.threads, potentially leading to session hijacking or data theft.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERT-PL","cpe":[],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"UBB.threads is vulnerable to Reflected XSS. The application improperly handles user input in certain requests, enabling attackers to execute arbitrary JavaScript in the context of a victim's browser by tricking them into clicking a crafted link. \nBecause vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Reflected XSS in UBB.threads","id":"CVE-2026-54221","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Blind SQL Injection in UBB.threads","id":"CVE-2026-54222"},"packages":[],"prev":{"headline":"Cross-Site Request Forgery in UBB.threads","id":"CVE-2026-54220"},"products":["UBB.threads"],"published":"2026-06-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-06-18","vendors":["UBB Systems"]},"summary":"Attackers can execute arbitrary JavaScript in victims' browsers via crafted links in UBB.threads, potentially leading to session hijacking or data theft.","url":"https://insights.sbomify.com/CVE-2026-54221/"}