Kiwi TCMS CVE-2026-54724
MEDIUM
GHSA-hmj5-jm8h-h9fh
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-accessible unauthenticated endpoint; user click required; scope change reflects cross-domain redirect; only indirect confidentiality and integrity impact via phishing, no availability impact.
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
1DescriptionGitHub Advisory
Summary
An open redirect vulnerability in the account confirmation endpoint allows an unauthenticated attacker to craft a URL hosted on a legitimate Kiwi TCMS instance that redirects victims to an arbitrary external domain. The attack surface is particularly relevant for phishing campaigns targeting Kiwi TCMS users, as the malicious link originates from a trusted organizational hostname.
Impact
This is an open redirect vulnerability (CWE-601). Any unauthenticated attacker can exploit it against any user of a Kiwi TCMS deployment.
The primary risk is phishing. Because Kiwi TCMS is typically deployed as an internal tool for engineering and QA teams, a redirect from the organization's own hostname carries high implicit trust. An attacker can use this endpoint to:
- Redirect victims to a credential-harvesting page styled to match the Kiwi TCMS or corporate SSO login.
- Bypass email security filters and link-reputation checks that allowlist the organization's domain.
- Distribute malware via a convincing "confirm your account" lure.
AnalysisAI
Open redirect in Kiwi TCMS's account confirmation endpoint allows unauthenticated remote attackers to craft URLs hosted on a legitimate organizational Kiwi TCMS instance that silently redirect victims to arbitrary external domains. All deployments running versions prior to v16.1 are affected, with no authentication required from the attacker - only a victim click. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The Kiwi TCMS account confirmation endpoint must be reachable by the victim (typically via internal network or VPN, though internet-exposed deployments are also affected). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 6.1 (Medium) is driven by AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker identifies a target organization's internal Kiwi TCMS instance and crafts an account confirmation URL with a malicious `next` or redirect parameter pointing to an attacker-controlled credential-harvesting page styled to mimic the corporate SSO portal. The attacker sends a phishing email to engineering or QA staff containing this URL - the link domain matches the organization's own hostname, bypassing both email security filters and user suspicion. … |
| Remediation | The primary fix is to upgrade Kiwi TCMS to v16.1 or later via pip (`pip install --upgrade kiwitcms`); this is the vendor-released patch confirmed by the GitHub release tag at https://github.com/kiwitcms/Kiwi/releases/tag/v16.1 and the advisory at https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-hmj5-jm8h-h9fh. … Detailed patch versions, workarounds, and compensating controls in full report. |
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