Impact

As HTML injection works in email an attacker can trick a victim to click on such hyperlinks to redirect him to any malicious site and also can host a XSS page. All this will surely cause some damage to the victim. This could lead to users being tricked into giving logins away to malicious attackers.

Patches

Update to version 3.4.2 or apply this patch manually https://github.com/pimcore/customer-data-framework/commit/72f45dd537a706954e7a71c99fbe318640e846a2.patch

Workarounds

Apply https://github.com/pimcore/customer-data-framework/commit/72f45dd537a706954e7a71c99fbe318640e846a2.patch manually.

References

https://huntr.dev/bounties/ce852777-2994-40b4-bb4e-c4d10023eeb0/