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CVE-2026-34031— Apache Answer: The custom avatar was not properly validated

Quick assessment

Affected
Apache Software Foundation Apache Answer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Answer是美国阿帕奇（Apache）基金会的一个社区平台。 Apache Answer 2.0.0及之前版本存在代码问题漏洞，该漏洞源于对危险类型文件上传限制不足，服务器未充分验证用户提供的图像URL，允许任意外部内容嵌入为个人资料图像，可能导致用户暴露于意外外部请求和第三方服务器跟踪。

AI Predicted 6.5 Difficulty: Easy EPSS 0.64% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Answer ≤ 2.0.0 affected
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I. Basic Information for CVE-2026-34031

Vulnerability Information
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Vulnerability Title
Apache Answer: The custom avatar was not properly validated
Source: CVE Program / CVE List V5
Vulnerability Description
Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile images, which could expose users to unintended external requests and tracking by third-party servers. Users are recommended to upgrade to version 2.0.1, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Answer 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Answer是美国阿帕奇（Apache）基金会的一个社区平台。 Apache Answer 2.0.0及之前版本存在代码问题漏洞，该漏洞源于对危险类型文件上传限制不足，服务器未充分验证用户提供的图像URL，允许任意外部内容嵌入为个人资料图像，可能导致用户暴露于意外外部请求和第三方服务器跟踪。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Answer 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-34031

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III. Intelligence Information for CVE-2026-34031

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Mailing List Discussions for CVE-2026-34031 (1)

Same Patch Batch · Apache Software Foundation · 2026-06-09 · 7 CVEs total

CVE-2026-49818 Apache Airflow Samba provider: Path traversal in GCSToSambaOperator via GCS object names
CVE-2026-34905 Apache Answer: Unlisted Questions Accessible via Direct API Access
CVE-2026-34033 Apache Answer: HTML Content Injection in Email
CVE-2026-33582 Apache Answer: Uploading specially crafted TIFF files causes an Out-of-Memory error
CVE-2026-25699 Apache Answer: Authorization Bypass in Timeline API
CVE-2026-25688 Apache Answer: XSS in AI Answer Rendering

IV. Related Vulnerabilities

Same product: Apache Answer
Same vendor: Apache Software Foundation
Same weakness: CWE-434

V. Comments for CVE-2026-34031

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