EUVD-2026-20940Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
7DescriptionGitHub Advisory
Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get(favicon_url, ...) with the default redirect-following. This vulnerability is fixed in 1.3.0.
AnalysisAI
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.
Technical ContextAI
CWE-918 SSRF via unvalidated HTTP redirects in favicon fetch operation. The fetch_and_encode_favicon() function uses requests.get(favicon_url) with default redirect-following behavior. While main page URL redirects receive validation, the favicon retrieval path lacks redirect chain inspection, allowing authenticated users to bypass previous SSRF protections and reach RFC1918 private address spaces through redirect chains.
RemediationAI
Vendor-released patch: Upgrade to Makeplane Plane version 1.3.0 or later, which implements complete redirect validation for favicon fetch operations. Organizations unable to upgrade immediately should implement network-level egress filtering to prevent internal network access from the Plane application server, and restrict 'Add link' feature permissions to trusted users only. Review application logs for suspicious favicon fetch requests targeting RFC1918 address ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). Complete vendor security advisory available at https://github.com/makeplane/plane/security/advisories/GHSA-9fr2-pprw-pp9j with additional implementation details and mitigation guidance.
Plane version 0.7.1 allows an unauthenticated attacker to view all stored server files of all users. Rated high severity
Plane is an open-source project management tool. Rated medium severity (CVSS 5.8), this vulnerability is remotely exploi
Plane version 0.7.1-dev allows an attacker to change the avatar of his profile, which allows uploading files with HTML e
Plane is an an open-source project management tool. [CVSS 8.5 HIGH]
Cross-workspace authorization bypass in Plane (makeplane) prior to version 1.3.1 allows any authenticated user of one wo
Plane versions before 1.2.2 contain a server-side request forgery vulnerability in the "Add Link" feature that allows au
Plane project management tool versions prior to 1.3.0 allow authenticated project members to modify issue dates across w
Unauthenticated attackers can enumerate workspace members and harvest sensitive information including email addresses, u
Stored cross-site scripting in Plane CE 1.3.1 allows an authenticated low-privileged project member to inject arbitrary
Cross-tenant authorization bypass in Plane's asset-management API allows any authenticated workspace member to read, del
ORM Field Reference Injection in Plane versions 1.3.0 and below enables any authenticated workspace MEMBER to exfiltrate
Plane prior to version 1.2.2 allows authenticated users to modify project assets across any workspace by directly refere
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
View allShare
External POC / Exploit Code
Leaving vuln.today