{"answers":{"affected":"2 open source packages ship an affected version, including concrete5/concrete5. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-28820 in the wild and no public exploit code.","fix":"Upgrade concrete5/concrete5 to 9.1.0 or later.","what":"CVE-2023-28820 is a low-severity cross-site scripting vulnerability in Concretecms Concrete Cms, published on 28 Apr 2023. 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-2023-28820 and fix it if it is affected.\n\nWhat it is: CVE-2023-28820 is a low-severity cross-site scripting vulnerability in Concretecms Concrete Cms, published on 28 Apr 2023. 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-2023-28820 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- concrete5/concrete5 (Packagist): affected all versions; fixed in 9.1.0\n- concrete5/concrete5 (Packagist): affected all versions; fixed in 9.1.0\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-2023-28820/ (Markdown: https://insights.sbomify.com/CVE-2023-28820/index.md)","id":"CVE-2023-28820","markdown":"https://insights.sbomify.com/CVE-2023-28820/index.md","name":"CVE-2023-28820","record":{"aliases":["GHSA-fgxj-g7x3-85cq"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Concrete CMS plugin","requires_auth":"high_privilege","summary":"Attackers can inject malicious scripts via unsanitized RSS links, potentially stealing user sessions or executing code in Concrete CMS.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"concrete_cms","vendor":"concretecms"}],"cvss":{"score":2,"severity":"low","source":"cna","vector":"CVSS:3.1/AC:H/AV:N/A:N/C:L/I:N/PR:H/S:U/UI:R","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.","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":"Stored cross site scripting in RSS displayer","id":"CVE-2023-28820","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"concretecms:concrete_cms","products":["concretecms:concrete_cms"],"type":"xss","year":"2023"},"n_packages":2,"n_references":2,"next":{"headline":"Missing rate limit for password resets","id":"CVE-2023-28821"},"packages":[{"ecosystem":"Packagist","fixed":["9.1.0"],"introduced":["0"],"last_affected":[],"package":"concrete5/concrete5","purl":null,"source":"GHSA-fgxj-g7x3-85cq"},{"ecosystem":"Packagist","fixed":["9.1.0"],"introduced":["0"],"last_affected":[],"package":"concrete5/concrete5","purl":"pkg:composer/concrete5/concrete5","source":"GHSA-fgxj-g7x3-85cq"}],"prev":{"headline":"Concrete CMS (previously concrete5) is vulnerable to stored XSS in uploaded file and folder names","id":"CVE-2023-28819"},"products":["n/a"],"published":"2023-04-28","related":[{"cvss_score":9.8,"headline":"Concrete CMS allows unauthorized access because directories can be created with insecure permissions","id":"CVE-2023-48648","kev_date_added":null,"published":"2023-11-17"},{"cvss_score":9.8,"headline":"Code injection in concrete CMS","id":"CVE-2022-21829","kev_date_added":null,"published":"2022-06-24"},{"cvss_score":9.8,"headline":"Server-Side Request Forgery vulnerability in concrete5","id":"CVE-2021-22958","kev_date_added":null,"published":"2021-10-07"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2021-40098","kev_date_added":null,"published":"2021-09-27"},{"cvss_score":9.4,"headline":"Concrete CMS Vulnerable to Relative Path Traversal","id":"CVE-2026-8134","kev_date_added":null,"published":"2026-05-21"},{"cvss_score":9.1,"headline":"Path traversal in Concrete CMS","id":"CVE-2022-30117","kev_date_added":null,"published":"2022-06-24"},{"cvss_score":9.1,"headline":"Deserialization in n/a","id":"CVE-2021-40102","kev_date_added":null,"published":"2021-09-24"}],"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":"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":"2025-01-31","vendors":["n/a"]},"summary":"Attackers can inject malicious scripts via unsanitized RSS links, potentially stealing user sessions or executing code in Concrete CMS.","url":"https://insights.sbomify.com/CVE-2023-28820/"}