#jira

New York, NY, 14th January 2026, CyberNewsWire

### Impact Anyone who has view rights on the `Calendar.JSONService` page, including guest users can exploit this vulnerability by accessing database info or starting a DoS attack. ### Workarounds Remove the `Calendar.JSONService` page. This will however break some functionalities. ### References Jira issue: * [FULLCAL-80: SQL injection through Calendar.JSONService](https://jira.xwiki.org/browse/FULLCAL-80) * [FULLCAL-81: SQL injection through Calendar.JSONService still exists](https://jira.xwiki.org/browse/FULLCAL-81) ### For more information If there are any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email [Security Mailing List](mailto:security@xwiki.org)

### Impact Anyone who has view rights on the `Calendar.JSONService` page, including guest users can exploit this vulnerability by accessing database info, with the exception of passwords. ### Workarounds Remove the `Calendar.JSONService` page. This will however break some functionalities. ### References Jira issue: * [FULLCAL-82: Calendar.JSONService exposes emails of all users](https://jira.xwiki.org/browse/FULLCAL-82) ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email us at [Security Mailing List](mailto:security@xwiki.org)

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Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to.

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Jenkins Redpen - Pipeline Reporter for Jira Plugin 1.054.v7b_9517b_6b_202 and earlier does not correctly perform path validation of the workspace directory while uploading artifacts to Jira, allowing attackers with Item/Configure permission to retrieve files present on the Jenkins controller workspace directory.