{"answers":{"affected":"5 open source packages ship an affected version, including wagtail. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-29434 in the wild and no public exploit code.","fix":"Upgrade wagtail to a fixed version for your release line: 2.11.7, 2.11.6 or 2.12.4.","what":"CVE-2021-29434 is a medium-severity cross-site scripting vulnerability in wagtail, published on 19 Apr 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-29434 and fix it if it is affected.\n\nWhat it is: CVE-2021-29434 is a medium-severity cross-site scripting vulnerability in wagtail, published on 19 Apr 2021. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-29434 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- wagtail (PyPI): affected all versions; fixed in 2.11.7\n- wagtail (PyPI): affected all versions; fixed in 2.11.7\n- wagtail (PyPI): affected from 2.11; fixed in 2.11.7, 2.11.6, 2.12.4\n- wagtail (PyPI): affected from 2.12; fixed in 2.12.4\n- wagtail (PyPI): affected from 2.12; fixed in 2.12.4\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-2021-29434/ (Markdown: https://insights.sbomify.com/CVE-2021-29434/index.md)","id":"CVE-2021-29434","markdown":"https://insights.sbomify.com/CVE-2021-29434/index.md","name":"CVE-2021-29434","record":{"aliases":["GHSA-wq5h-f9p5-q7fx","PYSEC-2021-114"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Wagtail CMS","requires_auth":"high_privilege","summary":"A malicious admin user can inject JavaScript into rich text fields due to missing server-side URL validation, leading to code execution.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"wagtail","vendor":"torchbox"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Wagtail is a Django content management system. In affected versions of Wagtail, when saving the contents of a rich text field in the admin interface, Wagtail does not apply server-side checks to ensure that link URLs use a valid protocol. A malicious user with access to the admin interface could thus craft a POST request to publish content with `javascript:` URLs containing arbitrary code. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. See referenced GitHub advisory for additional details, including a workaround. Patched versions have been released as Wagtail 2.11.7 (for the LTS 2.11 branch) and Wagtail 2.12.4 (for the current 2.12 branch).","ecosystems":["PyPI"],"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":"Improper validation of URLs ('Cross-site Scripting') in Wagtail rich text fields","id":"CVE-2021-29434","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":5,"n_references":2,"next":{"headline":"Cross-Site Request Forgery (CSRF) in trestle-auth","id":"CVE-2021-29435"},"packages":[{"ecosystem":"PyPI","fixed":["2.11.7"],"introduced":["0"],"last_affected":[],"package":"wagtail","purl":null,"source":"GHSA-wq5h-f9p5-q7fx"},{"ecosystem":"PyPI","fixed":["2.11.7"],"introduced":["0"],"last_affected":[],"package":"wagtail","purl":"pkg:pypi/wagtail","source":"GHSA-wq5h-f9p5-q7fx"},{"ecosystem":"PyPI","fixed":["2.11.7","2.11.6","2.12.4"],"introduced":["2.11","0","2.12"],"last_affected":[],"package":"wagtail","purl":"pkg:pypi/wagtail","source":"PYSEC-2021-114"},{"ecosystem":"PyPI","fixed":["2.12.4"],"introduced":["2.12"],"last_affected":[],"package":"wagtail","purl":null,"source":"GHSA-wq5h-f9p5-q7fx"},{"ecosystem":"PyPI","fixed":["2.12.4"],"introduced":["2.12"],"last_affected":[],"package":"wagtail","purl":"pkg:pypi/wagtail","source":"GHSA-wq5h-f9p5-q7fx"}],"prev":{"headline":"Denial of service (via resource exhaustion) due to improper input validation","id":"CVE-2021-29433"},"products":["wagtail"],"published":"2021-04-19","related":[{"cvss_score":7.3,"headline":"Wagtail: Reflected XSS in dynamic image URL generator view","id":"CVE-2026-54263","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":6.5,"headline":"Wagtail: Improper permission handling in image preview","id":"CVE-2026-54261","kev_date_added":null,"published":"2026-07-01"},{"cvss_score":6.5,"headline":"Wagtail: Improper permission handling when comparing revisions","id":"CVE-2026-44197","kev_date_added":null,"published":"2026-05-11"},{"cvss_score":6.5,"headline":"Wagtail: Improper permission handling when deleting form submissions","id":"CVE-2026-44199","kev_date_added":null,"published":"2026-05-11"},{"cvss_score":6.5,"headline":"Wagtail: Improper permission handling when copying pages","id":"CVE-2026-44200","kev_date_added":null,"published":"2026-05-11"},{"cvss_score":6.5,"headline":"Wagtail regular expression denial-of-service via search query parsing","id":"CVE-2024-39317","kev_date_added":null,"published":"2024-07-11"},{"cvss_score":6.4,"headline":"Wagtail vulnerable to stored Cross-site Scripting attack via ModelAdmin views","id":"CVE-2023-28836","kev_date_added":null,"published":"2023-04-03"}],"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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":["wagtail"]},"summary":"A malicious admin user can inject JavaScript into rich text fields due to missing server-side URL validation, leading to code execution.","url":"https://insights.sbomify.com/CVE-2021-29434/"}