How severe is CVE-2026-33677?

CVE-2026-33677 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-33677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33677?

CVE-2026-33677 affects Vikunja. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33677?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33677 have an EU (EUVD) identifier?

Yes. CVE-2026-33677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14920.

When was CVE-2026-33677 published?

CVE-2026-33677 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33677

CVE-2026-33677 is a medium-severity vulnerability in Vikunja with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14920
Weakness: CWE-200
Affected product: Vikunja
Published: 2026-03-24
Last modified: 2026-06-17

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. Version 2.2.1 patches the issue.

Frequently asked questions

What is CVE-2026-33677?: Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. Version 2.2.1 patches the issue.
How severe is CVE-2026-33677?: CVE-2026-33677 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-33677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33677?: CVE-2026-33677 affects Vikunja. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33677?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33677 have an EU (EUVD) identifier?: Yes. CVE-2026-33677 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14920.
When was CVE-2026-33677 published?: CVE-2026-33677 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*

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