{"id":"CVE-2023-45727","kind":"vulnerability","aliases":["CVE-2023-45727"],"related":[],"title":"northgrid proself: Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself…","description":"Proself Enterprise/Standard Edition Ver5.62 and earlier, Proself Gateway Edition Ver1.65 and earlier, and Proself Mail Sanitize Edition Ver1.08 and earlier allow a remote unauthenticated attacker to conduct XML External Entity (XXE) attacks. By processing a specially crafted request containing malformed XML data, arbitrary files on the server containing account information may be read by the attacker.","summary":"North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an XML External Entity (XXE) flaw that lets a remote attacker read server files or reach internal systems. The attack needs no login and the flaw is listed as actively exploited.","severity":"high","cvss":7.5,"epss":null,"exploited":true,"exploited_at":"2024-12-03T00:00:00+00:00","products":[{"name":"North Grid Proself","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"northgrid proself","fixed":["1.09"],"affected":"< 1.09","ecosystem":"vendor"},{"name":"northgrid proself","fixed":["1.66"],"affected":"< 1.66","ecosystem":"vendor"},{"name":"northgrid proself","fixed":["5.63"],"affected":"< 5.63","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","file-sharing","proself","self-hosted","vendor"],"not_affected_if":["default-config"],"how_to_check":null,"fix":"Apply the vendor mitigation for Proself per CISA guidance, or stop using the product if no mitigation is available.","status":"open","published_at":"2023-10-18T10:15:08+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:56:05+00:00","updated_at":"2026-10-23T22:29:05+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-23T20:56:05Z","model":"claude-haiku-5-5","output":{"fix":"Apply the vendor mitigation for Proself per CISA guidance, or stop using the product if no mitigation is available.","reach":"internet","impact":"medium","summary":"North Grid Proself Enterprise/Standard, Gateway, and Mail Sanitize contain an XML External Entity (XXE) flaw that lets a remote attacker read server files or reach internal systems. The attack needs no login and the flaw is listed as actively exploited.","category":"vendor","who_cares":["proself","self-hosted","file-sharing"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker reads server files and may reach internal network services","analyst_note":"Find the vendor advisory and the affected/fixed Proself versions and the mitigation steps via the CISA KEV entry (https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-45727); the sources do not list versions.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000488,"input_tokens":2857,"output_tokens":404,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':18A,21A '-45727':19A,22A 'account':129C 'activ':79B 'allow':101C 'arbitrari':123C 'attack':60B,69B,105C,112C,136C 'conduct':107C 'contain':49B,119C,128C 'craft':117C 'cve':17A,20A 'data':122C 'earlier':8A,14A,86C,92C,100C 'edit':5A,11A,83C,89C,97C 'enterprise/standard':4A,44B,82C 'entiti':53B,110C 'exploit':32B,80B 'extern':52B,109C 'file':34B,63B,124C 'file-shar':33B 'flaw':55B,75B 'gateway':10A,45B,88C 'grid':24A,42B 'host':39B 'inform':130C 'intern':66B 'let':57B 'list':77B 'login':72B 'mail':47B,95C 'malform':120C 'may':131C 'need':70B 'north':23A,41B 'northgrid':1A,26A,28A,30A 'process':114C 'proself':2A,3A,9A,16A,25A,27A,29A,31A,36B,43B,81C,87C,94C 'reach':65B 'read':61B,133C 'remot':59B,103C 'request':118C 'sanit':48B,96C 'self':38B 'self-host':37B 'server':62B,127C 'share':35B 'special':116C 'system':67B 'unauthent':104C 'vendor':40B 'ver1.08':98C 'ver1.65':12A,90C 'ver5.62':6A,84C 'xml':51B,108C,121C 'xxe':54B,111C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-10-18T10:15:08+00:00","kev":{"dateAdded":"2024-12-03","dueDate":"2024-12-24","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-45727","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-45727","severity":null,"published_at":"2024-12-03T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T13:39:30+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-45727","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-45727","severity":null,"published_at":"2023-10-18T10:15:08+00:00","modified_at":"2026-06-17T06:29:25+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}