{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-29455 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-29455 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-29455 is a high-severity authentication bypass vulnerability in grassrootza grassroot-platform, published on 19 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-29455 and fix it if it is affected.\n\nWhat it is: CVE-2021-29455 is a high-severity authentication bypass vulnerability in grassrootza grassroot-platform, published on 19 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-29455 in the wild and no public exploit code.\n\nAffected product: grassrootza grassroot-platform. 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-2021-29455/ (Markdown: https://insights.sbomify.com/CVE-2021-29455/index.md)","id":"CVE-2021-29455","markdown":"https://insights.sbomify.com/CVE-2021-29455/index.md","name":"CVE-2021-29455","record":{"aliases":[],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Grassroot Platform","requires_auth":"none","summary":"Attackers can forge valid JWTs due to missing signature verification during token refresh, enabling unauthorized access and potential privilege escalation.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"grassroot_platform","vendor":"grassroot"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"Grassroot Platform is an application to make it faster, cheaper and easier to persistently organize and mobilize people in low-income communities. Grassroot Platform before master deployment as of 2021-04-16 did not properly verify the signature of JSON Web Tokens when refreshing an existing JWT. This allows to forge a valid JWT. The problem has been patched in version 1.3.1 by deprecating the JWT refresh function, which was an overdue deprecation regardless (the \"refresh\" flow is no longer used).","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":"Missing validation of JWT signature in `grassrootza/grassroot-platform`","id":"CVE-2021-29455","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Authelia allows open redirects on the logout endpoint","id":"CVE-2021-29456"},"packages":[],"prev":{"headline":"Sandbox Escape by math function in smarty","id":"CVE-2021-29454"},"products":["grassroot-platform"],"published":"2021-04-19","related":[],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["grassrootza"]},"summary":"Attackers can forge valid JWTs due to missing signature verification during token refresh, enabling unauthorized access and potential privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-29455/"}