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Filter out Marketo's email tracker from URLs

See original GitHub issue

The Marketo mkt_tok query string parameter is for tracking users and can be disabled by campaign admins though apparently it’s also used in unsubscribe links.

Here is a longer description of how this parameter is used and what the security implications are: https://medium.com/@thezedwards/facebook-s-ongoing-vip-user-data-exfiltration-vulnerability-via-adobes-marketo-software-why-d8435a259b0

Need to find a real example and test the unsubscribe link before we can strip out in our query string filter.

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Reactions:1
  • Comments:25 (10 by maintainers)

github_iconTop GitHub Comments

2reactions
LaurenWagscommented, Jul 7, 2022

@arthuredelstein this issue is missing some key labels, can we get this reviewed please?

If manual QA is required let’s get QA/Yes and a test plan added. If not, QA/No can be added.

Does this apply to Desktop, Android, or both? Please add the appropriate OS/Desktop and/or OS/Android labels.

Does this need to be included in the release notes or no? Please add the appropriate release-notes/exclude or release-notes/include label.

cc @fmarier @pes10k in case either of you have insight as well.

cc @brave/qa-team @rebron

2reactions
arthuredelsteincommented, Jun 9, 2022

After a series of online searches, I am convinced that all (or nearly all) of unsubscribe links for Marketo emails contain the parameter mkt_unsubscribe=1 in the query string. So my approach to fixing this bug is to filter out the mkt_tok query parameter EXCEPT where mkt_unsubscribe=1 is also present in the query string.

Read more comments on GitHub >

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