CVE-2026-63373

4.2 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-21

AI risk analysis

Summary: The flaw allows an attacker to hijack a victim's draw.io session by exploiting OAuth callback handling in self-hosted deployments, leading to potential misattribution of cloud-storage actions.
Exploitability: Exploitation requires诱导受害者访问恶意回调URL，难度中等，需自建或访问特定部署。
Blast radius: 若被利用，可能导致用户在不知情的情况下执行云存储操作，造成会话完整性损失和责任归属错误。
Prioritized remediation: 升级至draw.io版本30.2.7以修复此漏洞。

auth-bypasswebcloud-storageself-hosted

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, the OAuth callback handler in src/main/java/com/mxgraph/online/AbsAuth.java skips comparison of stateToken and cookieToken whenever IS_GAE is false, which affects self-hosted Docker and WAR deployments. An attacker can provide an authorization code for the attacker's cloud-storage identity and induce a victim to visit a callback URL, causing the victim's draw.io session to become authenticated as the attacker identity without a valid state binding. The shared handler affects Google Drive, OneDrive, GitHub, GitLab, and Dropbox integrations. The victim can then unknowingly perform cloud-storage actions under the attacker's identity, causing session integrity loss and misattribution, but the identity binding does not itself grant access to existing victim cloud files. This issue is fixed in version 30.2.7.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Weaknesses

CWE-352

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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