Is this vulnerability remotely exploitable?

Yes. A remote attacker with the ability to register or access an account and upload attachments can exploit this by uploading a malicious SVG and then convincing another user to access the direct URL of that attachment.

Does an attacker need high privileges to exploit this issue?

Typically no. Any user with permissions to upload task attachments can introduce a malicious SVG. The victims are other authenticated users who view or open the attachment URL under the Vikunja origin.

What is the safest general fix pattern?

The most robust approach is to prevent execution of user-supplied scripts altogether by not rendering SVGs inline from the main application origin, combining this with strong server-side SVG sanitization or restricting uploads to non-executable image types. Moving authentication tokens to httpOnly cookies further limits what XSS can steal.

Severity:

HIGH RISK

(7.3)

Stored Cross-Site Scripting via SVG Attachments (CWE-79) in Vikunja Task Management Platform

CVE-2026-27616

Published:

Feb 25, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Stored Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Account Takeover / Session Compromise

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Stored Cross-Site Scripting (XSS)

CWE:

CWE-79

Impact:

Account Takeover / Session Compromise

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Stored Cross-Site Scripting via SVG Attachments (CWE-79) in Vikunja Task Management Platform

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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