{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-66490 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-66490 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-66490 is a medium-severity cross-site scripting vulnerability in balbooa.com Gridbox extension for Joomla, published on 29 Jul 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-2026-66490 and fix it if it is affected.\n\nWhat it is: CVE-2026-66490 is a medium-severity cross-site scripting vulnerability in balbooa.com Gridbox extension for Joomla, published on 29 Jul 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-2026-66490 in the wild and no public exploit code.\n\nAffected product: balbooa.com Gridbox extension for Joomla. 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-2026-66490/ (Markdown: https://insights.sbomify.com/CVE-2026-66490/index.md)","id":"CVE-2026-66490","markdown":"https://insights.sbomify.com/CVE-2026-66490/index.md","name":"CVE-2026-66490","record":{"aliases":["GHSA-6432-frr4-pgf6"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Joomla Gridbox extension","requires_auth":"none","summary":"Attackers can inject malicious scripts via comment avatars in the Gridbox extension, potentially compromising user sessions and site integrity.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Joomla","cpe":[{"product":"gridbox","vendor":"balbooa"}],"cvss":{"score":6.1,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/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":"Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox \u003c 2.20.2","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":"Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox \u003c 2.20.2","id":"CVE-2026-66490","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Joomla Extension - phoca.cz - Arbitrary File Read in Phoca Commander 1.0.0-6.1.3","id":"CVE-2026-66491"},"packages":[],"prev":{"headline":"Joomla Extension - balbooa.com - Various unauthenticated file system disclosure in Gridbox \u003c 2.20.2","id":"CVE-2026-66489"},"products":["Gridbox extension for Joomla"],"published":"2026-07-29","related":[{"cvss_score":10,"headline":"Joomla Extension - balbooa.com - Privilege Escalation in Gridbox \u003c 2.20.2","id":"CVE-2026-65884","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":10,"headline":"Joomla Extension - balbooa.com - Unauthenticated arbitrary password reset in Gridbox \u003c 2.20.2","id":"CVE-2026-65887","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":10,"headline":"Joomla Extension - balbooa.com - Account takeover vulnerability in Gridbox \u003c 2.20.2","id":"CVE-2026-65888","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":9.4,"headline":"Joomla Extension - balbooa.com - Authenticated arbitrary file upload in Gridbox \u003c 2.20.2","id":"CVE-2026-65885","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":9.2,"headline":"Joomla Extension - balbooa.com - Unauthenticated arbitrary file read in Gridbox \u003c 2.20.2","id":"CVE-2026-65886","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":9.2,"headline":"Joomla Extension - balbooa.com - Unauthenticated recursive directory deletion in Gridbox \u003c 2.20.2","id":"CVE-2026-65889","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":9.2,"headline":"Joomla Extension - balbooa.com - Unauthenticated SQL injection in Gridbox \u003c 2.20.2","id":"CVE-2026-65890","kev_date_added":null,"published":"2026-07-29"}],"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":"2026-08-12","vendors":["balbooa.com"]},"summary":"Attackers can inject malicious scripts via comment avatars in the Gridbox extension, potentially compromising user sessions and site integrity.","url":"https://insights.sbomify.com/CVE-2026-66490/"}