VulnerabilityAnalyzed

CVE-2026-33315

Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts.

MEDIUM 6.9EPSS 0.30%

Does this matter?

Lower severity and a low EPSS score (0.30%). Track it; it rarely justifies an emergency change on its own.

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.

CVSS 4.0: 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.30% probability · 23th percentile
CISA KEV: Not listed
Weakness: CWE-288
Affected: vikunja/vikunja
Source: security-advisories@github.com

References

https://github.com/go-vikunja/vikunja/commit/cdf5d30a425d032f749b78b98b828f25ad882615Patch
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-47cr-f226-r4pqExploit, Mitigation, Vendor Advisory
https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedRelease Notes

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.