{"answers":{"affected":"8 open source packages ship an affected version, including com.vaadin:vaadin-bom and com.vaadin:vaadin-server. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-31403 in the wild and no public exploit code.","fix":"Upgrade com.vaadin:vaadin-bom to a fixed version for your release line: 7.7.24 or 8.12.3.","what":"CVE-2021-31403 is a medium-severity vulnerability in Vaadin, published on 23 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-31403 and fix it if it is affected.\n\nWhat it is: CVE-2021-31403 is a medium-severity vulnerability in Vaadin, published on 23 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-31403 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- com.vaadin:vaadin-bom (Maven): affected from 7.0.0; fixed in 7.7.24\n- com.vaadin:vaadin-bom (Maven): affected from 7.0.0; fixed in 7.7.24\n- com.vaadin:vaadin-bom (Maven): affected from 8.0.0; fixed in 8.12.3\n- com.vaadin:vaadin-bom (Maven): affected from 8.0.0; fixed in 8.12.3\n- com.vaadin:vaadin-server (Maven): affected from 7.0.0; fixed in 7.7.24\n- com.vaadin:vaadin-server (Maven): affected from 7.0.0; fixed in 7.7.24\n- com.vaadin:vaadin-server (Maven): affected from 8.0.0; fixed in 8.12.3\n- com.vaadin:vaadin-server (Maven): affected from 8.0.0; fixed in 8.12.3\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-2021-31403/ (Markdown: https://insights.sbomify.com/CVE-2021-31403/index.md)","id":"CVE-2021-31403","markdown":"https://insights.sbomify.com/CVE-2021-31403/index.md","name":"CVE-2021-31403","record":{"aliases":["GHSA-75xc-qvxh-27f8"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Vaadin Java framework","requires_auth":"none","summary":"Attackers can bypass CSRF protection by guessing security tokens via timing side-channel attacks in the UIDL request handler.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Vaadin","cpe":[{"product":"vaadin","vendor":"vaadin"}],"cvss":{"score":4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-203","name":"Observable Discrepancy"},{"id":"CWE-208","name":"Observable Timing Discrepancy"}],"description":"Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:vaadin-server versions 7.0.0 through 7.7.23 (Vaadin 7.0.0 through 7.7.23), and 8.0.0 through 8.12.2 (Vaadin 8.0.0 through 8.12.2) allows attacker to guess a security token via timing attack","ecosystems":["Maven"],"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":"Timing side channel vulnerability in UIDL request handler in Vaadin 7 and 8","id":"CVE-2021-31403","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"security_feature_bypass","year":"2021"},"n_packages":8,"n_references":3,"next":{"headline":"Timing side channel vulnerability in UIDL request handler in Vaadin 10, 11-14, and 15-18","id":"CVE-2021-31404"},"packages":[{"ecosystem":"Maven","fixed":["7.7.24"],"introduced":["7.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-bom","purl":null,"source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["7.7.24"],"introduced":["7.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-bom","purl":"pkg:maven/com.vaadin/vaadin-bom","source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["8.12.3"],"introduced":["8.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-bom","purl":null,"source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["8.12.3"],"introduced":["8.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-bom","purl":"pkg:maven/com.vaadin/vaadin-bom","source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["7.7.24"],"introduced":["7.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-server","purl":null,"source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["7.7.24"],"introduced":["7.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-server","purl":"pkg:maven/com.vaadin/vaadin-server","source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["8.12.3"],"introduced":["8.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-server","purl":null,"source":"GHSA-75xc-qvxh-27f8"},{"ecosystem":"Maven","fixed":["8.12.3"],"introduced":["8.0.0"],"last_affected":[],"package":"com.vaadin:vaadin-server","purl":"pkg:maven/com.vaadin/vaadin-server","source":"GHSA-75xc-qvxh-27f8"}],"prev":{"headline":"dio vulnerable to CRLF injection with HTTP method string","id":"CVE-2021-31402"},"products":["Vaadin","vaadin-server"],"published":"2021-04-23","related":[{"cvss_score":7.5,"headline":"Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19","id":"CVE-2021-31409","kev_date_added":null,"published":"2021-05-05"},{"cvss_score":7.5,"headline":"Regular expression Denial of Service (ReDoS) in EmailValidator class in Vaadin 7","id":"CVE-2020-36320","kev_date_added":null,"published":"2021-04-23"},{"cvss_score":6.1,"headline":"Reflected cross-site scripting in vaadin-menu-bar webjar resources in Vaadin 14","id":"CVE-2021-33611","kev_date_added":null,"published":"2021-11-02"},{"cvss_score":5.7,"headline":"Possible information disclosure in non visible components","id":"CVE-2023-25499","kev_date_added":null,"published":"2023-06-22"},{"cvss_score":5.7,"headline":"Possible information disclosure inside TreeGrid component with default data provider","id":"CVE-2022-29567","kev_date_added":null,"published":"2022-05-24"},{"cvss_score":5.4,"headline":"Stored cross-site scripting in Grid component in Vaadin 7 and 8","id":"CVE-2019-25028","kev_date_added":null,"published":"2021-04-23"},{"cvss_score":5.3,"headline":"Unauthorized session creation via reserved framework path access","id":"CVE-2026-2742","kev_date_added":null,"published":"2026-03-10"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["Vaadin"]},"summary":"Attackers can bypass CSRF protection by guessing security tokens via timing side-channel attacks in the UIDL request handler.","url":"https://insights.sbomify.com/CVE-2021-31403/"}