WissKI security updates, in plain English

WissKI

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

This module adds support for an image viewer and allows people to add notes to images.

Below is every security update for WissKI 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.

WissKI

Critical · 237 sites report using it · SA-CONTRIB-2026-059 · on drupal.org · Week of 24 June 2026

Anyone without logging in could submit malicious details through a web address to bypass access checks in the image viewer. They could view hidden image annotations and modify certain research records. They could not access or alter every piece of information on the website.

Who could do thisAnyone visiting the site. No login needed.
Does it apply to youA site is affected if it uses the Mirador image viewer feature.
Has it been used in attacksNo sign of it.
How urgentDrupal rates this critical. Cyber Essentials expects a fix within 14 days. Do it this week.

Tell your developerUpdate WissKI to 8.x-4.2.

For developers: what the fix changed

The fix restricts session writes in WisskiMiradorApiController to only allow the mirador key, preventing arbitrary data from being stored in the session.

8.x-4.1 to 8.x-4.2 1 commit, 1 file.

wisski_mirador/src/Controller/WisskiMiradorApiController.php +3 −1 fix

Full diff, 8.x-4.1 to 8.x-4.2

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

Get in touch

Tell me who you are, what your organisation does, and what you need. That might be a Drupal site that needs looking after, an upgrade to get done before December, or an agency that needs Drupal cover.

If I can help, I'll say so and suggest a call. If I can't, I'll tell you straight away rather than waste your time.

For context: I work mainly with UK charities, membership bodies and research organisations, and with the agencies that look after their websites. Not recruiters.

Or start smaller and connect with me on LinkedIn. That's where I post what I find digging around in charity and grants data, and where the free tools turn up first.

WissKI

WissKI

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