CVE-2025-27817
Apache Kafka Client Arbitrary File Read and SSRF Vulnerability
Description
A possible arbitrary file read and SSRF vulnerability has been identified in Apache Kafka Client. Apache Kafka Clients accept configuration data for setting the SASL/OAUTHBEARER connection with the brokers, including "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url". Apache Kafka allows clients to read an arbitrary file and return the content in the error log, or sending requests to an unintended location. In applications where Apache Kafka Clients configurations can be specified by an untrusted party, attackers may use the "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url" configuratin to read arbitrary contents of the disk and environment variables or make requests to an unintended location. In particular, this flaw may be used in Apache Kafka Connect to escalate from REST API access to filesystem/environment/URL access, which may be undesirable in certain environments, including SaaS products. Since Apache Kafka 3.9.1/4.0.0, we have added a system property ("-Dorg.apache.kafka.sasl.oauthbearer.allowed.urls") to set the allowed urls in SASL JAAS configuration. In 3.9.1, it accepts all urls by default for backward compatibility. However in 4.0.0 and newer, the default value is empty list and users have to set the allowed urls explicitly.
INFO
Published Date :
June 10, 2025, 8:15 a.m.
Last Modified :
July 11, 2025, 4:58 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2025-27817 has a 7 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-27817.
| URL | Resource |
|---|---|
| https://kafka.apache.org/cve-list | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/06/09/1 | Mailing List Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Apache Kafka客户端未对用户输入进行严格验证和限制，未经身份验证的攻击者可通过构造恶意配置读取环境变量或磁盘任意内容，或向非预期位置发送请求，提升REST API的文件系统/环境/URL访问权限。
Python
CVE-2025-27817
None
HTML Python Shell
这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目
HTML
Generate logs from templates, or get logs from files, Elasticsearch or Kafka. Change the logs on the fly to create new, events and finally send the logs to console, file, Elasticsearch, Kafka, UDP or TCP
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Java
一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.
poc
Dockerfile
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-27817 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-27817 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 11, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:* versions from (including) 3.1.0 up to (excluding) 3.9.1 Added Reference Type Apache Software Foundation: https://kafka.apache.org/cve-list Types: Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2025/06/09/1 Types: Mailing List, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 10, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-918 -
New CVE Received by [email protected]
Jun. 10, 2025
Action Type Old Value New Value Added Description A possible arbitrary file read and SSRF vulnerability has been identified in Apache Kafka Client. Apache Kafka Clients accept configuration data for setting the SASL/OAUTHBEARER connection with the brokers, including "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url". Apache Kafka allows clients to read an arbitrary file and return the content in the error log, or sending requests to an unintended location. In applications where Apache Kafka Clients configurations can be specified by an untrusted party, attackers may use the "sasl.oauthbearer.token.endpoint.url" and "sasl.oauthbearer.jwks.endpoint.url" configuratin to read arbitrary contents of the disk and environment variables or make requests to an unintended location. In particular, this flaw may be used in Apache Kafka Connect to escalate from REST API access to filesystem/environment/URL access, which may be undesirable in certain environments, including SaaS products. Since Apache Kafka 3.9.1/4.0.0, we have added a system property ("-Dorg.apache.kafka.sasl.oauthbearer.allowed.urls") to set the allowed urls in SASL JAAS configuration. In 3.9.1, it accepts all urls by default for backward compatibility. However in 4.0.0 and newer, the default value is empty list and users have to set the allowed urls explicitly. Added Reference https://kafka.apache.org/cve-list -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 10, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/06/09/1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-27817 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-27817
weaknesses.