CVE-2026-33675— Vikunja has SSRF via Todoist/Trello Migration File Attachment URLs that Allows Reading Internal Network Resources
Quick assessment
Affected
go-vikunja vikunja
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.
Vikunja是Vikunja开源的一个待办事项应用程序。 Vikunja 2.2.1之前版本存在安全漏洞，该漏洞源于迁移辅助函数缺少SSRF保护，可能导致服务端请求伪造攻击。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2026-33675
Vulnerability Information
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Vulnerability Title
Vikunja has SSRF via Todoist/Trello Migration File Attachment URLs that Allows Reading Internal Network Resources
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the migration helper functions `DownloadFile` and `DownloadFileWithHeaders` in `pkg/modules/migration/helpers.go` make arbitrary HTTP GET requests without any SSRF protection. When a user triggers a Todoist or Trello migration, file attachment URLs from the third-party API response are passed directly to these functions, allowing an attacker to force the Vikunja server to fetch internal network resources and return the response as a downloadable task attachment. Version 2.2.1 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Vikunja 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vikunja是Vikunja开源的一个待办事项应用程序。 Vikunja 2.2.1之前版本存在安全漏洞，该漏洞源于迁移辅助函数缺少SSRF保护，可能导致服务端请求伪造攻击。
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 |
|---|---|---|---|---|
| go-vikunja | vikunja | < 2.2.1 | - |
|
II. Public POCs for CVE-2026-33675
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-33675 (1)
Vendor Advisories for CVE-2026-33675 (1)
Vendor Pages for CVE-2026-33675 (1)
Same Patch Batch · go-vikunja · 2026-03-24 · 16 CVEs total
| CVE-2026-33316 | 8.1 HIGH | Vikunja’s Improper Access Control Enables Bypass of Administrator-Imposed Account Disablem |
| CVE-2026-33678 | 8.1 HIGH | Vikunja has IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion |
| CVE-2026-33680 | 7.5 HIGH | Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission E |
| CVE-2026-33474 | 6.5 MEDIUM | Vikunja Affected by DoS via Image Preview Generation |
| CVE-2026-33677 | 6.5 MEDIUM | Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API |
| CVE-2026-33676 | 6.5 MEDIUM | Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorizatio |
| CVE-2026-33679 | 6.4 MEDIUM | Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections |
| CVE-2026-33473 | 5.7 MEDIUM | Vikunja has TOTP Reuse During Validity Window |
| CVE-2026-33315 | Vikunja has a 2FA Bypass via Caldav Basic Auth | |
| CVE-2026-33313 | Vikunja has an IDOR in Task Comments Allows Reading Arbitrary Comments | |
| CVE-2026-33335 | Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openEx | |
| CVE-2026-33334 | Vikunja Desktop: Any frontend XSS escalates to Remote Code Execution due to nodeIntegratio | |
| CVE-2026-33336 | Vikunja Desktop vulnerable to Remote Code Execution via same-window navigation | |
| CVE-2026-33668 | Vikunja Allows Disabled/Locked User Accounts to Authenticate via API Tokens, CalDAV, and O | |
| CVE-2026-33700 | Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Projec |
IV. Related Vulnerabilities
Same product: vikunja
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CVE-2026-91985
Vikunja before 2.6.0 Privilege Escalation via Link Share Has -
CVE-2026-91984
Vikunja before 2.6.0 Broken Object-Level Authorization via t -
CVE-2026-91983
Vikunja before 2.6.0 API Token Scope Bypass via expand Param -
CVE-2026-91982
Vikunja before 2.6.0 TOTP Secret Disclosure via API -
CVE-2026-91981
Vikunja before 2.6.0 User Enumeration via v2 API
Same vendor: go-vikunja
-
CVE-2026-91985
Vikunja before 2.6.0 Privilege Escalation via Link Share Has -
CVE-2026-91984
Vikunja before 2.6.0 Broken Object-Level Authorization via t -
CVE-2026-91983
Vikunja before 2.6.0 API Token Scope Bypass via expand Param -
CVE-2026-91982
Vikunja before 2.6.0 TOTP Secret Disclosure via API -
CVE-2026-91981
Vikunja before 2.6.0 User Enumeration via v2 API
Same weakness: CWE-918
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CVE-2026-105636
Plane: SSRF via HTTP redirect in webhook delivery (allow_red -
CVE-2026-105628
Plane: OAuth Avatar Redirect SSRF Leads to Internal Data Exf -
CVE-2026-104977
Plane: Incomplete fix of CVE-2026-27706 — SSRF still reachab -
CVE-2026-104976
Plane: SSRF in Gitea OAuth -
CVE-2026-104973
Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in We
V. Comments for CVE-2026-33675
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