{"answers":{"affected":"3 open source packages ship an affected version, including lxml. It affects 3 products.","exploited":"There is no known exploitation of CVE-2018-19787 in the wild and no public exploit code.","fix":"Upgrade lxml to 4.2.5 or later.","what":"CVE-2018-19787 is a medium-severity cross-site scripting vulnerability in Canonical Ubuntu Linux, published on 2 Dec 2018. 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-2018-19787 and fix it if it is affected.\n\nWhat it is: CVE-2018-19787 is a medium-severity cross-site scripting vulnerability in Canonical Ubuntu Linux, published on 2 Dec 2018. 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-2018-19787 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- lxml (PyPI): affected all versions; fixed in 4.2.5\n- lxml (PyPI): affected all versions; fixed in 4.2.5\n- lxml (PyPI): affected all versions; fixed in 4.2.5\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-2018-19787/ (Markdown: https://insights.sbomify.com/CVE-2018-19787/index.md)","id":"CVE-2018-19787","markdown":"https://insights.sbomify.com/CVE-2018-19787/index.md","name":"CVE-2018-19787","record":{"aliases":["AZL-6806","DEBIAN-CVE-2018-19787","GHSA-xp26-p53h-6h2p","MGASA-2018-0497","PYSEC-2018-12","UBUNTU-CVE-2018-19787","USN-3841-1","openSUSE-SU-2024:12414-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Python HTML cleaning library","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in victim browsers via escaped javascript URLs in HTML cleaned by lxml.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"lxml","vendor":"lxml"}],"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":"An issue was discovered in lxml before 4.2.5. lxml/html/clean.py in the lxml.html.clean module does not remove javascript: URLs that use escaping, allowing a remote attacker to conduct XSS attacks, as demonstrated by \"j a v a s c r i p t:\" in Internet Explorer. This is a similar issue to CVE-2014-3146.","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 Neutralization of Input During Web Page Generation in LXML","id":"CVE-2018-19787","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux"],"type":"xss","year":"2018"},"n_packages":3,"n_references":5,"next":{"headline":"Integer overflow in n/a","id":"CVE-2018-19788"},"packages":[{"ecosystem":"PyPI","fixed":["4.2.5"],"introduced":["0"],"last_affected":[],"package":"lxml","purl":null,"source":"GHSA-xp26-p53h-6h2p"},{"ecosystem":"PyPI","fixed":["4.2.5"],"introduced":["0"],"last_affected":[],"package":"lxml","purl":"pkg:pypi/lxml","source":"GHSA-xp26-p53h-6h2p"},{"ecosystem":"PyPI","fixed":["4.2.5"],"introduced":["0"],"last_affected":[],"package":"lxml","purl":"pkg:pypi/lxml","source":"PYSEC-2018-12"}],"prev":{"headline":"Information disclosure in n/a","id":"CVE-2018-19786"},"products":["n/a"],"published":"2018-12-02","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-18","vendors":["n/a"]},"summary":"Attackers can execute arbitrary JavaScript in victim browsers via escaped javascript URLs in HTML cleaned by lxml.","url":"https://insights.sbomify.com/CVE-2018-19787/"}