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Description

PasswordPusher before 2.8.1 accepts data URI schemes in URL push payloads due to insufficient validation in the valid_url function. Attackers can create malicious pushes containing data:text/html URIs that execute arbitrary JavaScript in victims' browsers when clicked, enabling phishing and credential theft under the trusted PasswordPusher domain.

PUBLISHED Reserved 2026-07-07 | Published 2026-07-08 | Updated 2026-07-14 | Assigner VulnCheck




MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N

HIGH: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Problem types

Permissive List of Allowed Inputs

Product status

Default status
unaffected

Any version before 2.8.1
affected

2.8.1 (semver)
unaffected

Credits

George Chen finder

References

github.com/...Pusher/security/advisories/GHSA-76c2-66pg-fj2f exploit

github.com/...Pusher/security/advisories/GHSA-76c2-66pg-fj2f (GitHub Security Advisory (GHSA-76c2-66pg-fj2f)) vendor-advisory

www.vulncheck.com/...ed-xss-via-data-uri-in-url-push-payload third-party-advisory

cve.org (CVE-2026-59802)

nvd.nist.gov (CVE-2026-59802)

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