{"basis":"claimed","id":"CVE-2025-53771","name":"Microsoft SharePoint Server Spoofing Vulnerability","vendorProject":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","publishedAt":"2025-07-20","cvss":{"score":6.5,"severity":"MEDIUM","version":"3.1"},"exploited":null,"epss":{"score":0.9989,"percentile":0.99965,"date":"2026-11-02"},"coverage":{"cloudflare":{"status":"blocks","firstOn":"2025-07-21","daysToRule":1},"aws":{"status":"none","firstOn":null,"daysToRule":null},"azure":{"status":"none","firstOn":null,"daysToRule":null},"google":{"status":"none","firstOn":null,"daysToRule":null},"fastly":{"status":"no_history","firstOn":null,"daysToRule":null},"f5":{"status":"rule","firstOn":"2025-08-15","daysToRule":26},"akamai":{"status":"no_source","firstOn":null,"daysToRule":null},"crs":{"status":"none","firstOn":null,"daysToRule":null}},"title":"Microsoft SharePoint Server Spoofing Vulnerability","description":"Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.","cwes":["CWE-287"],"vendors":[{"vendor":"cloudflare","status":"blocks","basis":"claimed","firstOn":"2025-07-21","firstIsNew":true,"daysToRule":1,"daysAtMost":null,"freePlan":false,"claims":[{"id":"8043829dcc5989931fdf0854122d3b08006a927793621acb76ae5c2ad16e52eb","cve_id":"CVE-2025-53771","vendor":"cloudflare","product":"Cloudflare Managed Ruleset","rule_id":"d21f327516a145bc9d1b05678de656c4","rule_name":"Microsoft SharePoint - Deserialization - CVE:CVE-2025-53771","change":"new","default_action":"Block","published_on":"2025-07-21","source_url":"https://developers.cloudflare.com/changelog/post/2025-07-21-emergency/","source_title":"WAF Release - 2025-07-21 - Emergency","excerpt":"Microsoft SharePoint - Deserialization - CVE:CVE-2025-53771. Previous action: N/A. New action: Block. This is a New Detection","first_seen_at":"2026-11-02T21:00:16.350Z"}]},{"vendor":"aws","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"azure","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"google","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"fastly","status":"no_history","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"f5","status":"rule","basis":"claimed","firstOn":"2025-08-15","firstIsNew":true,"daysToRule":26,"daysAtMost":null,"freePlan":false,"claims":[{"id":"3c74594acfee8e3c8ee66e007e2bbc005ef8726e5d8d8694d4fc7277607f5d1b","cve_id":"CVE-2025-53771","vendor":"f5","product":"Attack signatures","rule_id":"200204026","rule_name":"Microsoft SharePoint ToolPane Remote Code Execution","change":"new","default_action":null,"published_on":"2025-08-15","source_url":"https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog","source_title":"F5 Distributed Cloud attack signatures changelog","excerpt":"Added: signature 200204026 \"Microsoft SharePoint ToolPane Remote Code Execution\" (Server Side Code Injection, risk High), systems: SharePoint. References: CVE-2025-49704, CVE-2025-49706, CVE-2025-53770, CVE-2025-53771.","first_seen_at":"2026-11-02T21:00:25.890Z"}]},{"vendor":"akamai","status":"no_source","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]},{"vendor":"crs","status":"none","basis":"claimed","firstOn":null,"firstIsNew":false,"daysToRule":null,"daysAtMost":null,"freePlan":false,"claims":[]}],"updatedAt":"2026-11-02T21:16:34.613Z","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial"},"measured":[{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 1, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:02:57.000Z","verdict":"blocked","templateId":"CVE-2025-53771","templatePath":"http/cves/2025/CVE-2025-53771.yaml","requests":2,"blockedRequests":2,"rules":["934110"],"note":"","requestDetail":[{"method":"POST","path":"/_layouts/15/ToolPane.aspx/?…","status":403,"blocked":true,"rules":["934110"]},{"method":"POST","path":"/_layouts/15/ToolPane.aspx/?…","status":403,"blocked":true,"rules":["934110"]}]},{"engineId":"owasp-crs","engineName":"OWASP Core Rule Set","engineVersion":"4.25.0","runtime":"Coraza v3.8.1","config":"paranoia level 2, anomaly threshold 5, default CRS settings","ranAt":"2026-11-02T13:03:28.000Z","verdict":"blocked","templateId":"CVE-2025-53771","templatePath":"http/cves/2025/CVE-2025-53771.yaml","requests":2,"blockedRequests":2,"rules":["934110","934180","941330","941340","942200","942370","942430","942520"],"note":"","requestDetail":[{"method":"POST","path":"/_layouts/15/ToolPane.aspx/?…","status":403,"blocked":true,"rules":["934110","934180","941330","941340","942200","942370"]},{"method":"POST","path":"/_layouts/15/ToolPane.aspx/?…","status":403,"blocked":true,"rules":["934110","934180","941330","941340","942200","942370"]}]}],"social":{"total":0,"first_seen":null,"daily":[{"day":"2026-10-21","posts":0},{"day":"2026-10-22","posts":0},{"day":"2026-10-23","posts":0},{"day":"2026-10-24","posts":0},{"day":"2026-10-25","posts":0},{"day":"2026-10-26","posts":0},{"day":"2026-10-27","posts":0},{"day":"2026-10-28","posts":0},{"day":"2026-10-29","posts":0},{"day":"2026-10-30","posts":0},{"day":"2026-10-31","posts":0},{"day":"2026-11-01","posts":0},{"day":"2026-11-02","posts":0},{"day":"2026-11-03","posts":0}],"top_posts":[],"exploit_repositories":[]}}