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Description

SummaryThis advisory addresses an Open Redirection vulnerability in Mautic's user unlocking endpoint. This vulnerability could be exploited by an attacker to redirect legitimate users to malicious websites, potentially leading to phishing attacks or the delivery of exploit kits. Open Redirection via returnUrl Parameter: An Open Redirection vulnerability exists in the /s/action/unlock/user.user/0 endpoint. The returnUrl parameter, intended for post-action redirection, is not properly validated. This allows an attacker to craft a URL that, when clicked by a user, redirects them to an arbitrary external website controlled by the attacker. MitigationUpdate Mautic to a version that properly validates or sanitizes the returnUrl parameter to ensure that redirects only occur to trusted, internal URLs or explicitly whitelisted domains.

PUBLISHED Reserved 2025-05-27 | Published 2025-05-28 | Updated 2025-05-28 | Assigner Mautic




MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Problem types

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

Product status

Default status
unaffected

> 1.0.0 (semver) before < 6.0.2, < 5.2.6, < 4.4.16
affected

Credits

Tomasz Kowalczyk reporter

Tomasz Kowalczyk remediation developer

Nick Vanpraet remediation reviewer

Patryk Gruszka remediation reviewer

References

github.com/...mautic/security/advisories/GHSA-6vx9-9r2g-8373

cve.org (CVE-2025-5256)

nvd.nist.gov (CVE-2025-5256)

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