Plane

Stored cross-site scripting in Plane CE 1.3.1 allows an authenticated low-privileged project member to inject arbitrary HTML and JavaScript via the `description_html` field through the API v1 intake endpoint, with payloads persisting in the database and executing in the browsers of any user who views the affected intake item. The CVSS 4.0 vector rates confidentiality impact on the vulnerable system as High (VC:H), reflecting the realistic threat of session token exfiltration from higher-privileged users such as project administrators. No active exploitation has been confirmed and no public exploit code has been identified at time of analysis.

Cross-workspace authorization bypass in Plane (makeplane) prior to version 1.3.1 allows any authenticated user of one workspace to read, copy, delete, and overwrite file assets belonging to other workspaces on the same instance. The flaw stems from missing membership checks on V2 asset endpoints and is fixed in v1.3.1; no public exploit identified at time of analysis.

Server-Side Request Forgery (SSRF) in Makeplane Plane (versions 0.28.0 to before 1.3.0) allows authenticated attackers with low privileges to perform full-read SSRF attacks against internal network resources. The vulnerability exists because incomplete remediation of a previous SSRF issue (GHSA-jcc6-f9v6-f7jw) left the favicon fetch path vulnerable to redirect-based attacks. When an attacker supplies an HTML page containing a link tag with an href redirecting to a private IP address via the 'Add link' feature, the fetch_and_encode_favicon() function follows redirects without validation, enabling unauthorized access to internal resources. Requires authenticated access; no public exploit identified at time of analysis.

Plane project management tool versions prior to 1.3.0 leak user email addresses in authentication error URLs, transmitting personally identifiable information via unencrypted GET query parameters. The vulnerability requires high-privilege access and user interaction to trigger, exposing email disclosure with low confidentiality impact and no integrity or availability consequences. This is a low-severity information disclosure issue with CVSS 2.0, actively patched in version 1.3.0.

Plane project management tool versions prior to 1.3.0 allow authenticated project members to modify issue dates across workspace and project boundaries via the IssueBulkUpdateDateEndpoint, which lacks proper authorization filtering. An attacker with ADMIN or MEMBER role in any project can arbitrarily change start_date and target_date fields on issues they have no legitimate access to, enabling data integrity violations across the entire Plane instance. EPSS score of 6.5 reflects moderate real-world risk for this privilege escalation, with no public exploit code or active exploitation confirmed at time of analysis.

Unauthenticated attackers can enumerate workspace members and harvest sensitive information including email addresses, user roles, and internal identifiers from Plane prior to version 1.2.2 due to misconfigured Django REST Framework permissions. The vulnerability requires no authentication or user interaction and allows remote attackers to directly access protected endpoints over the network. No patch is currently available for affected Golang and Django deployments.

Plane is an an open-source project management tool. [CVSS 8.5 HIGH]

Plane versions before 1.2.2 contain a server-side request forgery vulnerability in the "Add Link" feature that allows authenticated users to send arbitrary GET requests to internal networks and retrieve full response bodies. An attacker with basic user privileges can exploit this to steal sensitive data from internal services and cloud metadata endpoints. No patch is currently available.

Plane prior to version 1.2.2 allows authenticated users to modify project assets across any workspace by directly referencing asset IDs, as the asset lookup fails to verify workspace and project ownership. An attacker with guest-level credentials can enumerate asset UUIDs and alter asset attributes and upload status without authorization. The vulnerability has been patched in version 1.2.2.

Plane is an an open-source project management tool. In plane.io, a guest user doesn't have a permission to access https[:]//app[.]plane[.]so/[:]slug/settings. [CVSS 4.3 MEDIUM]

Plane is open-source project management software. Rated low severity (CVSS 3.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Plane is an open-source project management tool. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.