{"vulnerability": "CVE-2025-27136", "sightings": [{"uuid": "809928fb-4b54-4e73-a805-69b2f82018a0", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-27136", "type": "seen", "source": "https://t.me/cvedetector/19995", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-27136 - Amazon LocalS3 XXE Injection Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2025-27136 \nPublished : March 10, 2025, 7:15 p.m. | 2\u00a0hours, 17\u00a0minutes ago \nDescription : LocalS3 is an Amazon S3 mock service for testing and local development. Prior to version 1.21, the LocalS3 service's bucket creation endpoint is vulnerable to XML External Entity (XXE) injection. When processing the CreateBucketConfiguration XML document during bucket creation, the service's XML parser is configured to resolve external entities. This allows an attacker to declare an external entity that references an internal URL, which the server will then attempt to fetch when parsing the XML. The vulnerability specifically occurs in the location constraint processing, where the XML parser resolves external entities without proper validation or restrictions. When the external entity is resolved, the server makes an HTTP request to the specified URL and includes the response content in the parsed XML document. This vulnerability can be exploited to perform server-side request forgery (SSRF) attacks, allowing an attacker to make requests to internal services or resources that should not be accessible from external networks. The server will include the responses from these internal requests in the resulting bucket configuration, effectively leaking sensitive information. The attacker only needs to be able to send HTTP requests to the LocalS3 service to exploit this vulnerability. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"10 Mar 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-03-10T23:13:53.000000Z"}, {"uuid": "5a8d58fb-f2cb-4cf2-b2f3-a964d30b1c04", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-27136", "type": "seen", "source": "https://t.me/GithubRedTeam/83916", "content": "\ud83d\udea8 GitHub \u76d1\u63a7\u6d88\u606f\u63d0\u9192\n\n\ud83d\udea8 \u53d1\u73b0\u5173\u952e\u8bcd\uff1a #XXE\n\n\ud83d\udce6 \u9879\u76ee\u540d\u79f0\uff1a CVE-2025-27136-XXE-LocalS3\n\ud83d\udc64 \u9879\u76ee\u4f5c\u8005\uff1a ZaidMkh32\n\ud83d\udee0 \u5f00\u53d1\u8bed\u8a00\uff1a Python\n\u2b50 Star\u6570\u91cf\uff1a 1  |  \ud83c\udf74 Fork\u6570\u91cf\uff1a 0\n\ud83d\udcc5 \u66f4\u65b0\u65f6\u95f4\uff1a 2026-05-12 09:47:31\n\n\ud83d\udcdd \u9879\u76ee\u63cf\u8ff0\uff1a\nProof of Concept for CVE-2025-27136 (XXE in Local-S3)\n\n\ud83d\udd17 \u70b9\u51fb\u8bbf\u95ee\u9879\u76ee\u5730\u5740", "creation_timestamp": "2026-05-12T10:02:47.000000Z"}, {"uuid": "024f9fcd-4915-4fda-86ff-90d8854f59a3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-27136", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/7039", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-27136\n\ud83d\udd25 CVSS Score: 5.5 (cvssV4_0, Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P)\n\ud83d\udd39 Description: LocalS3 is an Amazon S3 mock service for testing and local development. Prior to version 1.21, the LocalS3 service's bucket creation endpoint is vulnerable to XML External Entity (XXE) injection. When processing the CreateBucketConfiguration XML document during bucket creation, the service's XML parser is configured to resolve external entities. This allows an attacker to declare an external entity that references an internal URL, which the server will then attempt to fetch when parsing the XML. The vulnerability specifically occurs in the location constraint processing, where the XML parser resolves external entities without proper validation or restrictions. When the external entity is resolved, the server makes an HTTP request to the specified URL and includes the response content in the parsed XML document. This vulnerability can be exploited to perform server-side request forgery (SSRF) attacks, allowing an attacker to make requests to internal services or resources that should not be accessible from external networks. The server will include the responses from these internal requests in the resulting bucket configuration, effectively leaking sensitive information. The attacker only needs to be able to send HTTP requests to the LocalS3 service to exploit this vulnerability.\n\ud83d\udccf Published: 2025-03-10T18:24:38.743Z\n\ud83d\udccf Modified: 2025-03-10T19:09:21.238Z\n\ud83d\udd17 References:\n1. https://github.com/Robothy/local-s3/security/advisories/GHSA-g6wm-2v64-wq36\n2. https://github.com/Robothy/local-s3/commit/d6ed756ceb30c1eb9d4263321ac683d734f8836f", "creation_timestamp": "2025-03-10T19:38:32.000000Z"}, {"uuid": "c27035ef-bce9-42b7-abd7-f3ba6db39472", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-27136", "type": "published-proof-of-concept", "source": "https://t.me/information_security_channel/53894", "content": "CVE-2025-27136 \u2013 LocalS3 CreateBucketConfiguration Endpoint XXE Injection\nhttps://www.offsec.com/blog/cve-2025-27136/\n\nDiscover how CVE-2025-27136, a critical XXE vulnerability in LocalS3\u2019s CreateBucketConfiguration endpoint, can be exploited to access sensitive files. Learn how the flaw works and how to mitigate it.\nThe post CVE-2025-27136 \u2013 LocalS3 CreateBucketConfiguration Endpoint XXE Injection (https://www.offsec.com/blog/cve-2025-27136/) appeared first on OffSec (https://www.offsec.com/).", "creation_timestamp": "2025-07-24T15:47:44.000000Z"}]}