{"answers":{"affected":"4 open source packages ship an affected version, including mautic/core. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27910 in the wild and no public exploit code.","fix":"Upgrade mautic/core to a fixed version for your release line: 3.3.4 or 4.0.0.","what":"CVE-2021-27910 is a high-severity cross-site scripting vulnerability in Mautic, published on 30 Aug 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-2021-27910 and fix it if it is affected.\n\nWhat it is: CVE-2021-27910 is a high-severity cross-site scripting vulnerability in Mautic, published on 30 Aug 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-2021-27910 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- mautic/core (Packagist): affected all versions; fixed in 3.3.4\n- mautic/core (Packagist): affected all versions; fixed in 3.3.4\n- mautic/core (Packagist): affected from 4.0.0-alpha1; fixed in 4.0.0\n- mautic/core (Packagist): affected from 4.0.0-alpha1; fixed in 4.0.0\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-2021-27910/ (Markdown: https://insights.sbomify.com/CVE-2021-27910/index.md)","id":"CVE-2021-27910","markdown":"https://insights.sbomify.com/CVE-2021-27910/index.md","name":"CVE-2021-27910","record":{"aliases":["GHSA-86pv-95mj-7w5f"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Mautic marketing automation","requires_auth":"none","summary":"Attackers can inject arbitrary JavaScript via unauthenticated webhook callbacks, leading to code execution and data theft when users view lead details.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mautic","cpe":[{"product":"mautic","vendor":"acquia"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Insufficient sanitization / filtering allows for arbitrary JavaScript Injection in Mautic using the bounce management callback function. The values submitted in the \"error\" and \"error_related_to\" parameters of the POST request of the bounce management callback will be permanently stored and executed once the details page of an affected lead is opened by a Mautic user. An attacker with access to the bounce management callback function (identified with the Mailjet webhook, but it is assumed this will work uniformly across all kinds of webhooks) can inject arbitrary JavaScript Code into the \"error\" and \"error_related_to\" parameters of the POST request (POST /mailer/\u003cproduct / webhook\u003e/callback). It is noted that there is no authentication needed to access this function. The JavaScript Code is stored permanently in the web application and executed every time an authenticated user views the details page of a single contact / lead in Mautic. This means, arbitrary code can be executed to, e.g., steal or tamper with information.","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":"Stored XSS vulnerability on Bounce Management Callback","id":"CVE-2021-27910","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":4,"n_references":1,"next":{"headline":"XSS vulnerability on contacts view","id":"CVE-2021-27911"},"packages":[{"ecosystem":"Packagist","fixed":["3.3.4"],"introduced":["0"],"last_affected":[],"package":"mautic/core","purl":null,"source":"GHSA-86pv-95mj-7w5f"},{"ecosystem":"Packagist","fixed":["3.3.4"],"introduced":["0"],"last_affected":[],"package":"mautic/core","purl":"pkg:composer/mautic/core","source":"GHSA-86pv-95mj-7w5f"},{"ecosystem":"Packagist","fixed":["4.0.0"],"introduced":["4.0.0-alpha1"],"last_affected":[],"package":"mautic/core","purl":null,"source":"GHSA-86pv-95mj-7w5f"},{"ecosystem":"Packagist","fixed":["4.0.0"],"introduced":["4.0.0-alpha1"],"last_affected":[],"package":"mautic/core","purl":"pkg:composer/mautic/core","source":"GHSA-86pv-95mj-7w5f"}],"prev":{"headline":"XSS vulnerability on password reset page","id":"CVE-2021-27909"},"products":["Mautic"],"published":"2021-08-30","related":[{"cvss_score":9.6,"headline":"Cross-site Scripting vulnerability in Mautic's tracking pixel functionality","id":"CVE-2022-25772","kev_date_added":null,"published":"2022-06-20"},{"cvss_score":9.6,"headline":"Mautic is vulnerable to XSS vulnerability","id":"CVE-2020-35125","kev_date_added":null,"published":"2021-02-09"},{"cvss_score":9.6,"headline":"XSS vulnerability leveraged through referrers could allow un-authorized admin access in Mautic","id":"CVE-2020-35124","kev_date_added":null,"published":"2021-01-28"},{"cvss_score":9.1,"headline":"Remote Code Execution \u0026 File Deletion in Asset Uploads","id":"CVE-2024-47051","kev_date_added":null,"published":"2025-02-26"},{"cvss_score":9,"headline":"Mautic stored Cross-site Scripting (XSS)","id":"CVE-2020-35128","kev_date_added":null,"published":"2021-01-19"},{"cvss_score":8.8,"headline":"Mautic Cross-Site Request Forgery (CSRF)","id":"CVE-2017-8874","kev_date_added":null,"published":"2017-05-10"},{"cvss_score":8.3,"headline":"Sensitive Data Exposure due to inadequate user permission settings","id":"CVE-2022-25776","kev_date_added":null,"published":"2024-09-18"}],"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":"2024-09-17","vendors":["Mautic"]},"summary":"Attackers can inject arbitrary JavaScript via unauthenticated webhook callbacks, leading to code execution and data theft when users view lead details.","url":"https://insights.sbomify.com/CVE-2021-27910/"}