{"answers":{"affected":"2 open source packages ship an affected version, including yourls/yourls. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3783 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-3783 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-3783 is a medium-severity cross-site scripting vulnerability in yourls/yourls, published on 15 Sep 2021. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3783 and fix it if it is affected.\n\nWhat it is: CVE-2021-3783 is a medium-severity cross-site scripting vulnerability in yourls/yourls, published on 15 Sep 2021. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-3783 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- yourls/yourls (Packagist): affected all versions up to 1.8.2; no fix listed\n- yourls/yourls (Packagist): affected all versions up to 1.8.2; no fix listed\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-2021-3783/ (Markdown: https://insights.sbomify.com/CVE-2021-3783/index.md)","id":"CVE-2021-3783","markdown":"https://insights.sbomify.com/CVE-2021-3783/index.md","name":"CVE-2021-3783","record":{"aliases":["GHSA-cpq8-x35g-m439"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"URL shortener","requires_auth":"high_privilege","summary":"Attackers can inject malicious scripts into the Yourls URL shortener, potentially stealing user sessions or executing code in victim browsers.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"@huntrdev","cpe":[{"product":"yourls","vendor":"yourls"}],"cvss":{"score":6.6,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"yourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","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":false,"headline":"Cross-site Scripting (XSS) - Reflected in yourls/yourls","id":"CVE-2021-3783","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Garuda Linux Improper Authorization","id":"CVE-2021-3784"},"packages":[{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["1.8.2"],"package":"yourls/yourls","purl":null,"source":"GHSA-cpq8-x35g-m439"},{"ecosystem":"Packagist","fixed":[],"introduced":["0"],"last_affected":["1.8.2"],"package":"yourls/yourls","purl":"pkg:composer/yourls/yourls","source":"GHSA-cpq8-x35g-m439"}],"prev":{"headline":"Integer overflow in wayland","id":"CVE-2021-3782"},"products":["yourls/yourls"],"published":"2021-09-15","related":[{"cvss_score":9.8,"headline":"Access of Resource Using Incompatible Type ('Type Confusion') in yourls/yourls","id":"CVE-2019-14537","kev_date_added":null,"published":"2019-08-07"},{"cvss_score":8.8,"headline":"Cross-site Scripting (XSS) - Stored in yourls/yourls","id":"CVE-2021-3785","kev_date_added":null,"published":"2021-09-15"},{"cvss_score":6.5,"headline":"Improper Restriction of Rendered UI Layers or Frames in yourls/yourls","id":"CVE-2021-3734","kev_date_added":null,"published":"2021-08-26"},{"cvss_score":5.4,"headline":"YOURLS Stored Cross Site Scripting (XSS)","id":"CVE-2020-27388","kev_date_added":null,"published":"2020-10-23"},{"cvss_score":5,"headline":"Information disclosure in n/a","id":"CVE-2011-3824","kev_date_added":null,"published":"2011-09-24"},{"cvss_score":3.5,"headline":"Cross-Site Request Forgery (CSRF) in yourls/yourls","id":"CVE-2022-0088","kev_date_added":null,"published":"2022-04-03"}],"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":"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":["yourls"]},"summary":"Attackers can inject malicious scripts into the Yourls URL shortener, potentially stealing user sessions or executing code in victim browsers.","url":"https://insights.sbomify.com/CVE-2021-3783/"}