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CVE-2026-33313— Vikunja has an IDOR in Task Comments Allows Reading Arbitrary Comments

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 2.2.0之前版本存在安全漏洞，该漏洞源于API存在访问控制缺陷，可能导致经过身份验证的用户读取任意任务评论。

AI Predicted 4.4 Difficulty: Easy EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-33313

Vulnerability Information
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Vulnerability Title
Vikunja has an IDOR in Task Comments Allows Reading Arbitrary Comments
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, an authenticated user can read any task comment by ID, regardless of whether they have access to the task the comment belongs to, by substituting the task ID in the API URL with a task they do have access to. Version 2.2.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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 2.2.0之前版本存在安全漏洞，该漏洞源于API存在访问控制缺陷，可能导致经过身份验证的用户读取任意任务评论。
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 < 2.2.0 -

II. Public POCs for CVE-2026-33313

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III. Intelligence Information for CVE-2026-33313

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Patches & Fixes for CVE-2026-33313 (1)

Vendor Advisories for CVE-2026-33313 (1)

Vendor Pages for CVE-2026-33313 (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-2026-33675 6.4 MEDIUM Vikunja has SSRF via Todoist/Trello Migration File Attachment URLs that Allows Reading Int
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-2026-33335 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
Same vendor: go-vikunja
Same weakness: CWE-639

V. Comments for CVE-2026-33313

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