CVE-2026-107801 banq CVE debrief

Who should care

Defenders responsible for Jivejdon deployments should assess exposure and verify the vulnerability in their inventory. This includes administrators and security teams managing Jivejdon instances, especially those allowing file uploads or serving files inline based on Content-Type.

Why it matters

CVE-2026-107801 is a stored XSS vulnerability in Jivejdon through 5.0, allowing authenticated attackers to execute JavaScript via attachment uploads. Defenders should prioritize verifying the vulnerability in their inventory and assessing exposure to mitigate potential impacts.

• JavaScript execution on the application's origin for viewing users
• Potential for attackers to perform actions on behalf of users
• Possible theft of sensitive information or session hijacking
• Defenders need to verify vulnerability and assess exposure in their inventory

Technical summary

The vulnerability exists in Jivejdon through version 5.0, where an authenticated attacker can upload a file with a specially crafted Content-Type, such as text/html, which is served inline by the UploadShowAction. This allows the attacker to execute JavaScript on the application's origin for viewing users. The vulnerability allows authenticated attackers to execute JavaScript by uploading attachments with an attacker-supplied Content-Type. Attackers can upload a file declared as text/html, which UploadShowAction serves inline, and share its link to run JavaScript on the application's origin for viewing users.

Defensive priority

Defenders should prioritize verifying the vulnerability in their inventory and assessing exposure, as it allows for JavaScript execution on the application's origin.

Recommended defensive actions

• Verify Jivejdon version and assess exposure
• Restrict file uploads to only serve files with expected Content-Types
• Implement Content Security Policy to mitigate XSS
• Monitor for suspicious attachment uploads and JavaScript execution
• 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 CVE record and source item provide details about the vulnerability, including its existence in Jivejdon through version 5.0 and the possibility of executing JavaScript via uploaded attachments. However, there is limited information on affected versions beyond 5.0 and no specific details on exploitation or victim impact.

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.