CVE-2026-107798 banq CVE debrief

Who should care

Defenders responsible for jivejdon deployments should assess exposure and verify the TextStyle filter implementation to prevent JavaScript injection. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure that the TextStyle filter is properly configured and that user input is validated to prevent JavaScript execution.

Why it matters

CVE-2026-107798 is a stored cross-site scripting vulnerability in jivejdon, allowing authenticated attackers to execute JavaScript when other users interact with rendered links. Defenders should prioritize verifying the TextStyle filter implementation and user input validation to prevent JavaScript injection.

• Execution of arbitrary JavaScript code
• Potential for phishing attacks
• Possible data theft or unauthorized actions
• Required verification of user input validation and TextStyle filter implementation

Technical summary

The vulnerability exists in the TextStyle filter of jivejdon, which inserts unvalidated URLs into anchor href attributes. This allows authenticated attackers to post messages with javascript: links or quote-breaking URLs, executing JavaScript when other users click or hover over rendered links. The issue is present from commit 595d8d22 through commit ee67a65e. Defenders should prioritize verifying the TextStyle filter implementation and user input validation to prevent JavaScript injection. This vulnerability can lead to execution of arbitrary JavaScript code, potential for phishing attacks, and possible data theft or unauthorized actions.

Defensive priority

Defenders should prioritize verifying the TextStyle filter implementation and user input validation to prevent JavaScript injection.

Recommended defensive actions

• Verify the TextStyle filter implementation to prevent JavaScript injection
• Validate user input to ensure proper filtering of special characters
• Implement Content Security Policy (CSP) to restrict JavaScript execution
• Monitor user interactions with rendered links for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The vulnerability exists in jivejdon from commit 595d8d22 through commit ee67a65e. The TextStyle filter inserts unvalidated URLs into anchor href attributes, allowing for JavaScript execution. This issue allows authenticated attackers to post messages with javascript: links or quote-breaking URLs to execute JavaScript when other users click or hover over rendered links. Evidence is based on source-provided details and limited to public information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.