{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3649 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3649 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3649 is a high-severity denial of service vulnerability in chatwoot/chatwoot, published on 16 Jul 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-2021-3649 and fix it if it is affected.\n\nWhat it is: CVE-2021-3649 is a high-severity denial of service vulnerability in chatwoot/chatwoot, published on 16 Jul 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-2021-3649 in the wild and no public exploit code.\n\nAffected product: chatwoot/chatwoot. 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-2021-3649/ (Markdown: https://insights.sbomify.com/CVE-2021-3649/index.md)","id":"CVE-2021-3649","markdown":"https://insights.sbomify.com/CVE-2021-3649/index.md","name":"CVE-2021-3649","record":{"aliases":["GHSA-964r-mpxx-74p7"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Chatwoot customer support","requires_auth":"none","summary":"Attackers can cause denial of service in Chatwoot by exploiting inefficient regular expression complexity.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"chatwoot","vendor":"chatwoot"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"},"cwes":[{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"chatwoot is vulnerable to Inefficient Regular Expression Complexity","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Inefficient Regular Expression Complexity in chatwoot/chatwoot","id":"CVE-2021-3649","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-3651"},"packages":[],"prev":{"headline":"Open Redirect in medialize/URI.js","id":"CVE-2021-3647"},"products":["chatwoot/chatwoot"],"published":"2021-07-16","related":[{"cvss_score":9.4,"headline":"Improper Restriction of Excessive Authentication Attempts in chatwoot/chatwoot","id":"CVE-2022-3741","kev_date_added":null,"published":"2022-10-28"},{"cvss_score":9.1,"headline":"Chatwoot has a Blind SQL-injection in Conversation and Contacts filters","id":"CVE-2025-21628","kev_date_added":null,"published":"2025-01-09"},{"cvss_score":8.8,"headline":"Cross-site Scripting (XSS) - DOM in chatwoot/chatwoot","id":"CVE-2022-0542","kev_date_added":null,"published":"2022-08-19"},{"cvss_score":8.1,"headline":"Cross-site Scripting (XSS) - Stored in chatwoot/chatwoot","id":"CVE-2022-1022","kev_date_added":null,"published":"2022-04-21"},{"cvss_score":7.9,"headline":"Server-Side Request Forgery (SSRF) in chatwoot/chatwoot","id":"CVE-2021-3742","kev_date_added":null,"published":"2024-11-15"},{"cvss_score":7.8,"headline":"Stored Cross-site Scripting (XSS) in chatwoot/chatwoot","id":"CVE-2021-3741","kev_date_added":null,"published":"2024-11-15"},{"cvss_score":7.6,"headline":"Improper Authorization in chatwoot/chatwoot","id":"CVE-2022-2901","kev_date_added":null,"published":"2022-09-06"}],"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":["chatwoot"]},"summary":"Attackers can cause denial of service in Chatwoot by exploiting inefficient regular expression complexity.","url":"https://insights.sbomify.com/CVE-2021-3649/"}