{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34491 exists.","fix":"No fix has been published for CVE-2025-34491 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-34491 is a high-severity unsafe deserialization vulnerability in GFI MailEssentials, published on 28 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-34491 and fix it if it is affected.\n\nWhat it is: CVE-2025-34491 is a high-severity unsafe deserialization vulnerability in GFI MailEssentials, published on 28 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34491 exists.\n\nAffected product: GFI MailEssentials. 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-2025-34491/ (Markdown: https://insights.sbomify.com/CVE-2025-34491/index.md)","id":"CVE-2025-34491","markdown":"https://insights.sbomify.com/CVE-2025-34491/index.md","name":"CVE-2025-34491","record":{"aliases":["GHSA-fqqj-qgxm-vg3x"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Email security software","requires_auth":"low_privilege","summary":"Authenticated attackers can execute arbitrary code via insecure .NET deserialization in GFI MailEssentials Multi-Server setups.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"mailessentials","vendor":"gfi"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"GFI MailEssentials \u003c 21.8 MultiNode Insecure Deserialization","id":"CVE-2025-34491","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2025"},"n_packages":0,"n_references":3,"next":{"headline":"This CVE ID was rejected because it was reserved but not used for a vulnerability disclosure.","id":"CVE-2025-34492"},"packages":[],"prev":{"headline":"GFI MailEssentials \u003c 21.8 XXE Arbitrary File Read","id":"CVE-2025-34490"},"products":["MailEssentials"],"published":"2025-04-28","related":[{"cvss_score":10,"headline":"Denial of service in n/a","id":"CVE-2004-1312","kev_date_added":null,"published":"2005-01-06"},{"cvss_score":7.8,"headline":"GFI MailEssentials \u003c 21.8 Local Privilege Escalation","id":"CVE-2025-34489","kev_date_added":null,"published":"2025-04-28"},{"cvss_score":6.5,"headline":"GFI MailEssentials \u003c 21.8 XXE Arbitrary File Read","id":"CVE-2025-34490","kev_date_added":null,"published":"2025-04-28"},{"cvss_score":5.3,"headline":"GFI MailEssentials AI \u003c 22.4 ListServer.IsDBExist() Absolute Directory Traversal to File Enumeration","id":"CVE-2026-23620","kev_date_added":null,"published":"2026-02-19"},{"cvss_score":5.3,"headline":"GFI MailEssentials AI \u003c 22.4 ListServer.IsPathExist() Absolute Directory Traversal to File Enumeration","id":"CVE-2026-23621","kev_date_added":null,"published":"2026-02-19"},{"cvss_score":5.1,"headline":"GFI MailEssentials AI \u003c 22.4 Keyword Filtering Rule Stored XSS","id":"CVE-2026-23604","kev_date_added":null,"published":"2026-02-19"}],"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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-11-19","vendors":["GFI"]},"summary":"Authenticated attackers can execute arbitrary code via insecure .NET deserialization in GFI MailEssentials Multi-Server setups.","url":"https://insights.sbomify.com/CVE-2025-34491/"}