CVE-2026-102980 makeplane CVE debrief

Who should care

Defenders responsible for managing and securing Plane installations, particularly those using versions prior to 1.4.0, should assess exposure and apply the fix to prevent unintended information disclosure.

Why it matters

CVE-2026-102980 is a medium-severity vulnerability in Plane that allows for cross-project page content disclosure. Defenders should prioritize verifying exposure and applying the fix to prevent unintended information disclosure.

• Defenders need to verify exposure and apply the fix to prevent cross-project page content disclosure.
• System administrators should review project configurations and workspace settings to ensure proper access controls are in place.
• Security teams should monitor for suspicious activity related to page content disclosure.

Technical summary

The PageVersionEndpoint in Plane's apps/api/plane/app/views/page/version.py does not properly scope page-version lookups by project_id from the URL, allowing a member of one project to read description_html for a public page in another project within the same workspace. This issue enables unintended information disclosure but does not allow cross-project page modification. Defenders should prioritize verifying exposure and applying the fix, as the affected path is read-only but could lead to unintended information disclosure.

Defensive priority

Defenders should prioritize verifying exposure and applying the fix, as the affected path is read-only but could lead to unintended information disclosure.

Recommended defensive actions

• Verify if the system is using a version of Plane prior to 1.4.0 and update to 1.4.0 or later.
• Review project configurations and workspace settings to ensure proper access controls are in place.
• Monitor for any suspicious activity related to page content disclosure.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and source item provide details on the vulnerability, its impact, and the fix. However, there is limited information on potential exploitation or victim impact. Defenders should verify exposure by reviewing project configurations and workspace settings to ensure proper access controls are in place. They should also monitor for suspicious activity related to page content disclosure and review relevant logs for exposed assets that need extra review.

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.