{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-4420 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-4420 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4420 is a medium-severity cross-site scripting vulnerability in Bludit, published on 7 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-4420 and fix it if it is affected.\n\nWhat it is: CVE-2026-4420 is a medium-severity cross-site scripting vulnerability in Bludit, published on 7 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-4420 in the wild and no public exploit code.\n\nAffected product: Bludit. 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-2026-4420/ (Markdown: https://insights.sbomify.com/CVE-2026-4420/index.md)","id":"CVE-2026-4420","markdown":"https://insights.sbomify.com/CVE-2026-4420/index.md","name":"CVE-2026-4420","record":{"aliases":["GHSA-w5x8-257x-9rv5"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Bludit CMS","requires_auth":"low_privilege","summary":"Authenticated attackers can inject malicious scripts via page tags, leading to code execution and potential privilege escalation when victims visit the resource.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CERT-PL","cpe":[{"product":"bludit","vendor":"bludit"}],"cvss":{"score":5.1,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/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":"Bludit is vulnerable to Stored Cross-Site Scripting (XSS) in its page creating functionality. An authenticated attacker with page creation privileges (such as Author, Editor, or Administrator) can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be executed when a victim visits the URL of the uploaded resource. The uploaded resource itself is accessible without authentication. Critically, this vulnerability could be used to automatically create a new site administrator if the victim has enough privileges. \n\nThe vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 3.17.2 and 3.18.0 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable.","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":"Stored XSS via Page Creating functionality in Bludit","id":"CVE-2026-4420","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing","id":"CVE-2026-4424"},"packages":[],"prev":{"headline":"IBM Cloud Pak System HTML Injection","id":"CVE-2026-4418"},"products":["Bludit"],"published":"2026-04-07","related":[{"cvss_score":9.8,"headline":"File upload in n/a","id":"CVE-2020-18879","kev_date_added":null,"published":"2021-08-20"},{"cvss_score":9.1,"headline":"Path traversal in n/a","id":"CVE-2020-20495","kev_date_added":null,"published":"2021-08-31"},{"cvss_score":9.1,"headline":"Path traversal in n/a","id":"CVE-2020-18190","kev_date_added":null,"published":"2020-10-02"},{"cvss_score":8.9,"headline":"Bludit - Remote Code Execution (RCE) through File API","id":"CVE-2024-24550","kev_date_added":null,"published":"2024-06-24"},{"cvss_score":8.9,"headline":"Bludit - Remote Code Execution (RCE) through Image API","id":"CVE-2024-24551","kev_date_added":null,"published":"2024-06-24"},{"cvss_score":8.8,"headline":"File upload in n/a","id":"CVE-2020-20210","kev_date_added":null,"published":"2023-06-26"},{"cvss_score":8.8,"headline":"Privilege escalation in n/a","id":"CVE-2023-31572","kev_date_added":null,"published":"2023-05-16"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["Bludit"]},"summary":"Authenticated attackers can inject malicious scripts via page tags, leading to code execution and potential privilege escalation when victims visit the resource.","url":"https://insights.sbomify.com/CVE-2026-4420/"}