{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-35139 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-35139 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-35139 is a medium-severity cross-site scripting vulnerability in Zyxel  USG FLEX 50(W) series firmware, published on 28 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-35139 and fix it if it is affected.\n\nWhat it is: CVE-2023-35139 is a medium-severity cross-site scripting vulnerability in Zyxel  USG FLEX 50(W) series firmware, published on 28 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-35139 in the wild and no public exploit code.\n\nAffected product: Zyxel  USG FLEX 50(W) series firmware. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2023-35139/ (Markdown: https://insights.sbomify.com/CVE-2023-35139/index.md)","id":"CVE-2023-35139","markdown":"https://insights.sbomify.com/CVE-2023-35139/index.md","name":"CVE-2023-35139","record":{"aliases":["GHSA-wjqc-5477-jpgg"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["data_read","account_takeover"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Zyxel firewall firmware","requires_auth":"none","summary":"An unauthenticated LAN attacker can inject malicious scripts into Zyxel firewall firmware, stealing user cookies upon visiting a specific log page.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Zyxel","cpe":[{"product":"zld","vendor":"zyxel"}],"cvss":{"score":5.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/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":"A cross-site scripting (XSS) vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50(W) series firmware versions 5.10 through 5.37, USG20(W)-VPN series firmware versions 5.10 through 5.37, and VPN series firmware versions 5.00 through 5.37, could allow an unauthenticated LAN-based attacker to store malicious scripts in a vulnerable device. A successful XSS attack could then result in the stored malicious scripts being executed to steal cookies when the user visits the specific CGI used for dumping ZTP logs.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in USG FLEX 50(W) series firmware","id":"CVE-2023-35139","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Privilege escalation in GS1900-24EP firmware","id":"CVE-2023-35140"},"packages":[],"prev":{"headline":"Command injection in NAS326 firmware","id":"CVE-2023-35138"},"products":[" USG FLEX 50(W) series firmware","ATP series firmware","USG FLEX series firmware","USG20(W)-VPN series firmware","VPN series firmware"],"published":"2023-11-28","related":[{"cvss_score":7.5,"headline":"Zyxel Multiple Firewalls Path Traversal","id":"CVE-2024-11667","kev_date_added":"2024-12-03","published":"2024-11-27"},{"cvss_score":8.1,"headline":"Missing authorization in ATP series firmware","id":"CVE-2025-9133","kev_date_added":null,"published":"2025-10-21"},{"cvss_score":8.1,"headline":"Command injection in ATP series firmware","id":"CVE-2024-42057","kev_date_added":null,"published":"2024-09-03"},{"cvss_score":7.5,"headline":"Null dereference in ATP series firmware","id":"CVE-2024-42058","kev_date_added":null,"published":"2024-09-03"},{"cvss_score":7.5,"headline":"Integer overflow in ATP series firmware","id":"CVE-2023-4398","kev_date_added":null,"published":"2023-11-28"},{"cvss_score":7.2,"headline":"Command injection in ATP series firmware","id":"CVE-2025-8078","kev_date_added":null,"published":"2025-10-21"},{"cvss_score":7.2,"headline":"Command injection in ATP series firmware","id":"CVE-2024-42059","kev_date_added":null,"published":"2024-09-03"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2024-08-02","vendors":["Zyxel"]},"summary":"An unauthenticated LAN attacker can inject malicious scripts into Zyxel firewall firmware, stealing user cookies upon visiting a specific log page.","url":"https://insights.sbomify.com/CVE-2023-35139/"}