Monobank payment API security updates, in plain English

Monobank payment API

48 sites report using it · on drupal.org · 1 security update explained here

This module connects a website to the Monobank payment service.

Below is every security update for Monobank payment API that this site has covered, newest first. Each one says who could exploit it, whether it applies to your site, how urgent it is, and what to tell your developer. If your site uses this module and you are not sure which version, that is the first question to ask whoever looks after it.

Monobank payment API

Moderately critical · 48 sites report using it · SA-CONTRIB-2026-130 · on drupal.org · Week of 2 September 2026

The module does not check the digital signature from Monobank before processing payment status updates. A visitor could change payment statuses. They could not read any hidden data.

Who could do thisAnyone visiting the site. No login needed.
Does it apply to youAny site using this module.
Has it been used in attacksNo sign of it.
How urgentDrupal rates this moderately critical. Include it in your next routine update, within the month.

Tell your developerUpdate Monobank payment API to 1.0.3.

For developers: what the fix changed

Adds webhook signature verification in the `status` callback within `src/Controller/Pages.php` and implements the verification logic in `src/Monobank.php`.

Also in this release Added Drupal 12 support, dropped Drupal 9, migrated hooks to a new class using attributes, and updated translation method calls.

1.0.2 to 1.0.3 3 commits, 9 files.

monobank.info.yml +2 −2
monobank.module +12 −33
monobank.services.yml +4 −0
src/Controller/Pages.php +22 −15 fix
src/Form/MonobankPaymentsForm.php +9 −9
src/Form/SettingsForm.php +4 −4
src/Hook/MonobankHooks.php +84 −0
src/Monobank.php +115 −3 fix
src/Plugin/Basket/Payment/BasketMonobank.php +5 −5

Full diff, 1.0.2 to 1.0.3

The comparison is against the release immediately before the fix. If your site is on an older release, more will have changed.

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Monobank payment API

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