# MISP 2.5.19 brings important fixes, improvements to the on-demand correlation engine, refinements in the task scheduler, and better error handling

**URL:** <https://discourse.ossbase.org/t/misp-2-5-19-brings-important-fixes-improvements-to-the-on-demand-correlation-engine-refinements-in-the-task-scheduler-and-better-error-handling/708>\
**Category:** MISP Project\
**Created:** [August 29, 2025, 12:43pm UTC](https://discourse.ossbase.org/t/misp-2-5-19-brings-important-fixes-improvements-to-the-on-demand-correlation-engine-refinements-in-the-task-scheduler-and-better-error-handling/708 "2025-08-29T12:43:30Z")\
**Posts on this page:** 1\
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**Author:** ![adulau](https://discourse.ossbase.org/user_avatar/discourse.ossbase.org/adulau/32/6_2.png) [@adulau](https://discourse.ossbase.org/u/adulau)\
**Post date:** [August 29, 2025, 12:43pm UTC](https://discourse.ossbase.org/t/misp-2-5-19-brings-important-fixes-improvements-to-the-on-demand-correlation-engine-refinements-in-the-task-scheduler-and-better-error-handling/708/1 "2025-08-29T12:43:31Z")

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# MISP 2.5.19 Release Notes

_Release date: 2025-08-20_

MISP 2.5.19 brings important fixes, improvements to the on-demand correlation engine, refinements in the task scheduler, and better error handling.

This release includes many community contributions — thank you for your continued support and improvements!

## ✨ New Features

- **On-demand correlation** :  
Added support for _top correlations_ in the on-demand correlation engine.

## 🔄 Changes

- Bumped version number.
- Improved exception handling — errors now point users to the error log.
- Scheduled tasks:
  - Restricted to own organisation users.
  - Default user selection now pre-fills with the current user.

- Worker configuration files can differ across environments.
- More descriptive warning messages for the new task scheduler.

## 🐛 Fixes

- **Sync / Events** :  
Correctly pass fingerprint to `_add` if it exists to avoid issues.
- **On-demand correlation** :  
Fixed multiple issues with `value2-value2` matching and upgraded the correlation script.
- **Shadow attributes** :  
Support for accept/discard operations by UUID.
- Removed obsolete `periodic_summary` from server options.
- **Stack traces** :  
Now show the actual origin of errors.
- **Attribute search** rework:
  - Downloaded results now match UI results.
  - Added additional fields for CSV export.

- **Attribute / Add** :  
Correctly adhere to provided tag locality in `/attributes/add`.
- **Workflow editor** :  
Running a workflow in debug mode now shows the expected response.
- **Logs controller** :  
Fixed broken named params search (#10424).
- **Tag index improvements** :
  - Removed edit/distribution graph icons from the tag name field.
  - Fixed notice error for regular users (`maymodify` always set to `false`).

- JSON parsing fixes for authentication key IP lists.

## 🧩 Other Improvements

- Updated `bootstrap.default.php`.
- Multiple branch merges and code cleanups from community contributions.
- Fixed JSON parsing error for `ip-port` format in auth key handling.

## ✅ Upgrade Notes

- It is recommended to upgrade to this version to benefit from correlation engine improvements, more robust task scheduling, and bug fixes.
- After upgrade, ensure worker configurations are checked if running across different environments.

## 🙏 Acknowledgements

Thanks to all contributors for their work on this release.

[MISP Project](https://www.misp-project.org) • [GitHub Repository](https://github.com/MISP/MISP)