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CVE-2026-63101— Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint

CVSS 7.5 · High EPSS 0.30% · P23

Affected Version Matrix 1

VendorProductVersion RangeStatus
fossasiaopen-event-server≤ 1.19.1affected
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I. Basic Information for CVE-2026-63101

Vulnerability Information
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Vulnerability Title
Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Open Event Server through 1.19.1 contains a missing authentication vulnerability that allows unauthenticated attackers to export the complete member roster of any group, including email addresses, names, join dates, and roles, by submitting requests to the group followers CSV export endpoint which lacks any authentication decorator. Attackers can enumerate sequential group IDs via brute-force, trigger an export via the unauthenticated POST endpoint, then poll the unauthenticated task status endpoint until completion to retrieve a download URL containing the full member CSV.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
FOSSASIA Open Event Server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FOSSASIA Open Event Server是新加披FOSSASIA组织开源的一个用于管理事件的开放事件组织者服务器。 FOSSASIA Open Event Server 1.19.1及之前版本存在授权问题漏洞，该漏洞源于缺少身份验证，可能导致未经身份验证的攻击者通过向缺少身份验证装饰器的组关注者CSV导出端点发送请求，导出任意组的完整成员名单，包括电子邮件地址、姓名、加入日期和角色，攻击者可通过暴力枚举组ID，触发导出，然后轮询任务状态端点以获取包含完整成员CSV的下载URL。
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

VendorProductAffected VersionsCPESubscribe
fossasiaopen-event-server 0 ~ 1.19.1 -

II. Public POCs for CVE-2026-63101

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8425 chars
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III. Intelligence Information for CVE-2026-63101

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News Coverage for CVE-2026-63101 (1)

Other References for CVE-2026-63101 (1)

IV. Related Vulnerabilities

Same product: open-event-server
Same vendor: fossasia
Same weakness: CWE-306

V. Comments for CVE-2026-63101

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