{"answers":{"affected":"2 open source packages ship an affected version, including nunjucks. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2142 exists.","fix":"Upgrade nunjucks to 3.2.4 or later.","what":"CVE-2023-2142 is a medium-severity cross-site scripting vulnerability in Mozilla Nunjucks, published on 26 Nov 2024. 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-2023-2142 and fix it if it is affected.\n\nWhat it is: CVE-2023-2142 is a medium-severity cross-site scripting vulnerability in Mozilla Nunjucks, published on 26 Nov 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-2142 exists.\n\nAffected packages and fixed versions:\n- nunjucks (npm): affected all versions; fixed in 3.2.4\n- nunjucks (npm): affected all versions; fixed in 3.2.4\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-2023-2142/ (Markdown: https://insights.sbomify.com/CVE-2023-2142/index.md)","id":"CVE-2023-2142","markdown":"https://insights.sbomify.com/CVE-2023-2142/index.md","name":"CVE-2023-2142","record":{"aliases":["DEBIAN-CVE-2023-2142","GHSA-x77j-w7wf-fjmw","UBUNTU-CVE-2023-2142"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Nunjucks template engine","requires_auth":"none","summary":"Attackers can bypass autoescape to inject cross-site scripting payloads via backslash characters in user-controlled parameters.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mozilla","cpe":[{"product":"nunjucks","vendor":"mozilla"}],"cvss":{"score":6.1,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"In Nunjucks versions prior to version 3.2.4, it was \npossible to bypass the restrictions which are provided by the autoescape\n functionality. If there are two user-controlled parameters on the same \nline used in the views, it was possible to inject cross site scripting \npayloads using the backslash \\ character.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Nunjucks autoescape bypass leads to cross site scripting","id":"CVE-2023-2142","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2023"},"n_packages":2,"n_references":2,"next":{"headline":"Enable SVG, WebP \u0026 ICO Upload \u003c= 1.0.3 - Author+ Stored XSS","id":"CVE-2023-2143"},"packages":[{"ecosystem":"npm","fixed":["3.2.4"],"introduced":["0"],"last_affected":[],"package":"nunjucks","purl":null,"source":"GHSA-x77j-w7wf-fjmw"},{"ecosystem":"npm","fixed":["3.2.4"],"introduced":["0"],"last_affected":[],"package":"nunjucks","purl":"pkg:npm/nunjucks","source":"GHSA-x77j-w7wf-fjmw"}],"prev":{"headline":"Unsafe .NET object deserialization affecting DELMIA Apriso Release 2017 through Release 2022","id":"CVE-2023-2141"},"products":["Nunjucks"],"published":"2024-11-26","related":[{"cvss_score":6.1,"headline":"Cross-Site Scripting in nunjucks","id":"CVE-2016-10547","kev_date_added":null,"published":"2018-05-31"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-27","vendors":["Mozilla"]},"summary":"Attackers can bypass autoescape to inject cross-site scripting payloads via backslash characters in user-controlled parameters.","url":"https://insights.sbomify.com/CVE-2023-2142/"}