{"answers":{"affected":"2 open source packages ship an affected version, including svelte. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-45047 exists.","fix":"Upgrade svelte to 4.2.19 or later.","what":"CVE-2024-45047 is a medium-severity cross-site scripting vulnerability in sveltejs svelte, published on 30 Aug 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-2024-45047 and fix it if it is affected.\n\nWhat it is: CVE-2024-45047 is a medium-severity cross-site scripting vulnerability in sveltejs svelte, published on 30 Aug 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-2024-45047 exists.\n\nAffected packages and fixed versions:\n- svelte (npm): affected all versions; fixed in 4.2.19\n- svelte (npm): affected all versions; fixed in 4.2.19\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-2024-45047/ (Markdown: https://insights.sbomify.com/CVE-2024-45047/index.md)","id":"CVE-2024-45047","markdown":"https://insights.sbomify.com/CVE-2024-45047/index.md","name":"CVE-2024-45047","record":{"aliases":["GHSA-8266-84wp-wv5c"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Svelte web framework","requires_auth":"none","summary":"Attackers can execute malicious scripts via mutation XSS in Svelte's server-side rendering due to improper HTML escaping in noscript tags.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"svelte","vendor":"svelte"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"svelte performance oriented web framework. A potential mXSS vulnerability exists in Svelte for versions up to but not including 4.2.19. Svelte improperly escapes HTML on server-side rendering. The assumption is that attributes will always stay as such, but in some situation the final DOM tree rendered on browsers is different from what Svelte expects on server-side rendering. This may be leveraged to perform XSS attacks, and a type of the XSS is known as mXSS (mutation XSS). More specifically, this can occur when injecting malicious content into an attribute within a `noscript` tag. This issue has been addressed in release version 4.2.19. Users are advised to upgrade. There are no known workarounds for this vulnerability.","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":"Potential mXSS vulnerability due to improper HTML escaping in svelte","id":"CVE-2024-45047","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2024"},"n_packages":2,"n_references":1,"next":{"headline":"XML External Entity Reference (XXE) in PHPSpreadsheet","id":"CVE-2024-45048"},"packages":[{"ecosystem":"npm","fixed":["4.2.19"],"introduced":["0"],"last_affected":[],"package":"svelte","purl":null,"source":"GHSA-8266-84wp-wv5c"},{"ecosystem":"npm","fixed":["4.2.19"],"introduced":["0"],"last_affected":[],"package":"svelte","purl":"pkg:npm/svelte","source":"GHSA-8266-84wp-wv5c"}],"prev":{"headline":"PhpSpreadsheet HTML writer is vulnerable to Cross-Site Scripting via style information","id":"CVE-2024-45046"},"products":["svelte"],"published":"2024-08-30","related":[{"cvss_score":7.8,"headline":"Code injection in n/a","id":"CVE-2021-29261","kev_date_added":null,"published":"2021-04-05"},{"cvss_score":5.9,"headline":"Svelte: ReDoS in `\u003csvelte:element\u003e` Tag Validation","id":"CVE-2026-42567","kev_date_added":null,"published":"2026-06-09"},{"cvss_score":5.4,"headline":"Cross-site Scripting (XSS)","id":"CVE-2022-25875","kev_date_added":null,"published":"2022-07-12"},{"cvss_score":5.3,"headline":"Svelte: XSS via DOM Clobbering of Internal Framework State","id":"CVE-2026-42573","kev_date_added":null,"published":"2026-06-09"},{"cvss_score":5.3,"headline":"Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`","id":"CVE-2026-27901","kev_date_added":null,"published":"2026-02-26"},{"cvss_score":5.3,"headline":"Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers","id":"CVE-2026-27902","kev_date_added":null,"published":"2026-02-26"}],"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":"2024-08-30","vendors":["sveltejs"]},"summary":"Attackers can execute malicious scripts via mutation XSS in Svelte's server-side rendering due to improper HTML escaping in noscript tags.","url":"https://insights.sbomify.com/CVE-2024-45047/"}