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CVE-2026-57957— Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint

Quick assessment

Affected
papermark papermark
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.

papermark是papermark个人开发者开源的一个文档分享平台。 Papermark 0.22.0及之前版本存在配置错误漏洞，该漏洞源于跨域资源共享（CORS）配置错误，可能导致未经身份验证的远程攻击者利用基于TUS的查看器上传端点，该端点会将任意请求Origin设置为Access-Control-Allow-Credentials=true，从而执行携带凭据的跨域请求，诱使已验证的用户访问恶意页面以静默上传任意文件到受害者的数据房间并读取带凭据的响应。

CVSS 4.7 · Medium EPSS 0.44% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
papermark papermark ≤ 0.22.0 affected
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I. Basic Information for CVE-2026-57957

Vulnerability Information
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Vulnerability Title
Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with Access-Control-Allow-Credentials set to true. Attackers can lure authenticated victims to malicious pages that silently issue credentialed cross-origin requests to upload arbitrary files into victim datarooms and read credentialed responses.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
过度许可的跨域白名单
Source: CVE Program / CVE List V5
Vulnerability Title
Papermark 配置错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
papermark是papermark个人开发者开源的一个文档分享平台。 Papermark 0.22.0及之前版本存在配置错误漏洞，该漏洞源于跨域资源共享（CORS）配置错误，可能导致未经身份验证的远程攻击者利用基于TUS的查看器上传端点，该端点会将任意请求Origin设置为Access-Control-Allow-Credentials=true，从而执行携带凭据的跨域请求，诱使已验证的用户访问恶意页面以静默上传任意文件到受害者的数据房间并读取带凭据的响应。
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
papermark papermark 0 ~ 0.22.0 -

II. Public POCs for CVE-2026-57957

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III. Intelligence Information for CVE-2026-57957

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Patches & Fixes for CVE-2026-57957 (1)

Vendor Advisories for CVE-2026-57957 (2)

IV. Related Vulnerabilities

Same weakness: CWE-942

V. Comments for CVE-2026-57957

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