{"answers":{"affected":"6 open source packages ship an affected version, including silverstripe/userforms.","exploited":"There is no known exploitation of CVE-2026-54721 in the wild and no public exploit code.","fix":"Upgrade silverstripe/userforms to a fixed version for your release line: 6.4.9, 7.0.7 or 7.1.1.","what":"CVE-2026-54721 is a high-severity code injection vulnerability in silverstripe-userforms, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54721 and fix it if it is affected.\n\nWhat it is: CVE-2026-54721 is a high-severity code injection vulnerability in silverstripe-userforms, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-54721 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- silverstripe/userforms (Packagist): affected all versions; fixed in 6.4.9\n- silverstripe/userforms (Packagist): affected all versions; fixed in 6.4.9\n- silverstripe/userforms (Packagist): affected from 7.0.0; fixed in 7.0.7\n- silverstripe/userforms (Packagist): affected from 7.0.0; fixed in 7.0.7\n- silverstripe/userforms (Packagist): affected from 7.1.0; fixed in 7.1.1\n- silverstripe/userforms (Packagist): affected from 7.1.0; fixed in 7.1.1\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-2026-54721/ (Markdown: https://insights.sbomify.com/CVE-2026-54721/index.md)","id":"CVE-2026-54721","markdown":"https://insights.sbomify.com/CVE-2026-54721/index.md","name":"CVE-2026-54721","record":{"aliases":["GHSA-g8wr-r2v2-vqc6"],"analysis":{"component_type":"cms_plugin","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Silverstripe UserForms plugin","requires_auth":"low_privilege","summary":"Authenticated CMS users can execute arbitrary server-side code via the email subject field in Silverstripe UserForms.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-94","name":"Improper Control of Generation of Code"}],"description":"Silverstripe UserForms provides a visual form builder for the Silverstripe CMS. From 6.0.0 until 6.4.9, 7.0.7, and 7.1.1, the userform email recipient subject field in the CMS accepts a specially crafted payload that can be interpreted as executable server-side code. An authenticated CMS user with permission to configure a UserForms email recipient can use the subject field to run arbitrary code on the server, compromising confidentiality, integrity, and availability. This issue is fixed in versions 6.4.9, 7.0.7, and 7.1.1.","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":"Silverstripe UserForms: Remote code execution via userforms email subject","id":"CVE-2026-54721","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"code_injection","year":"2026"},"n_packages":6,"n_references":8,"next":{"headline":"dssrf: there a critical security bug with remove_at_symbol_in_string","id":"CVE-2026-54722"},"packages":[{"ecosystem":"Packagist","fixed":["6.4.9"],"introduced":["0"],"last_affected":[],"package":"silverstripe/userforms","purl":null,"source":"GHSA-g8wr-r2v2-vqc6"},{"ecosystem":"Packagist","fixed":["6.4.9"],"introduced":["0"],"last_affected":[],"package":"silverstripe/userforms","purl":"pkg:composer/silverstripe/userforms","source":"GHSA-g8wr-r2v2-vqc6"},{"ecosystem":"Packagist","fixed":["7.0.7"],"introduced":["7.0.0"],"last_affected":[],"package":"silverstripe/userforms","purl":null,"source":"GHSA-g8wr-r2v2-vqc6"},{"ecosystem":"Packagist","fixed":["7.0.7"],"introduced":["7.0.0"],"last_affected":[],"package":"silverstripe/userforms","purl":"pkg:composer/silverstripe/userforms","source":"GHSA-g8wr-r2v2-vqc6"},{"ecosystem":"Packagist","fixed":["7.1.1"],"introduced":["7.1.0"],"last_affected":[],"package":"silverstripe/userforms","purl":null,"source":"GHSA-g8wr-r2v2-vqc6"},{"ecosystem":"Packagist","fixed":["7.1.1"],"introduced":["7.1.0"],"last_affected":[],"package":"silverstripe/userforms","purl":"pkg:composer/silverstripe/userforms","source":"GHSA-g8wr-r2v2-vqc6"}],"prev":{"headline":"Silverstripe Framework: Possible XSS attack through media embed","id":"CVE-2026-54720"},"products":["silverstripe-userforms"],"published":"2026-08-27","related":[],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-28","vendors":["silverstripe"]},"summary":"Authenticated CMS users can execute arbitrary server-side code via the email subject field in Silverstripe UserForms.","url":"https://insights.sbomify.com/CVE-2026-54721/"}