{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21439 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-21439 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 14 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-21439 and fix it if it is affected.\n\nWhat it is: CVE-2021-21439 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 14 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-21439 in the wild and no public exploit code.\n\nAffected product: Otrs Otrs. 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-2021-21439/ (Markdown: https://insights.sbomify.com/CVE-2021-21439/index.md)","id":"CVE-2021-21439","markdown":"https://insights.sbomify.com/CVE-2021-21439/index.md","name":"CVE-2021-21439","record":{"aliases":["DEBIAN-CVE-2021-21439","GHSA-58p7-gj75-3437","UBUNTU-CVE-2021-21439"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OTRS ticketing system","requires_auth":"none","summary":"Attackers can cause high CPU usage or system halts in OTRS by sending emails with specially crafted URLs in the body.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OTRS","cpe":[{"product":"otrs","vendor":"otrs"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"},{"id":"CWE-754","name":"Improper Check for Unusual or Exceptional Conditions"}],"description":"DoS attack can be performed when an email contains specially designed URL in the body. It can lead to the high CPU usage and cause low quality of service, or in extreme case bring the system to a halt. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.26 and prior versions; 8.0.x version 8.0.13 and prior versions.","ecosystems":[],"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":"Possible DoS attack using a special crafted URL in email body","id":"CVE-2021-21439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"otrs:otrs","products":["otrs:otrs"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Support Bundle includes S/Mime and PGP keys","id":"CVE-2021-21440"},"packages":[],"prev":{"headline":"FAQ articles are shown to users without permission","id":"CVE-2021-21438"},"products":["((OTRS)) Community Edition","OTRS"],"published":"2021-06-14","related":[{"cvss_score":9.1,"headline":"SQL Injection via MySQL Quote Method","id":"CVE-2026-48188","kev_date_added":null,"published":"2026-06-01"},{"cvss_score":8.8,"headline":"SQL injection in n/a","id":"CVE-2013-4717","kev_date_added":null,"published":"2021-08-09"},{"cvss_score":8.8,"headline":"Code injection in n/a","id":"CVE-2017-14635","kev_date_added":null,"published":"2017-09-21"},{"cvss_score":8.7,"headline":"SSL Certificates are not checked for E-Mail Handling","id":"CVE-2023-5422","kev_date_added":null,"published":"2023-10-16"},{"cvss_score":8.1,"headline":"Password is send back to client","id":"CVE-2023-6254","kev_date_added":null,"published":"2023-11-27"},{"cvss_score":7.6,"headline":"Information disclouse and DoS via websocket push events","id":"CVE-2023-2534","kev_date_added":null,"published":"2023-05-08"},{"cvss_score":7.5,"headline":"DoS attack using email","id":"CVE-2022-39052","kev_date_added":null,"published":"2022-10-17"}],"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":"2024-09-16","vendors":["OTRS AG"]},"summary":"Attackers can cause high CPU usage or system halts in OTRS by sending emails with specially crafted URLs in the body.","url":"https://insights.sbomify.com/CVE-2021-21439/"}