CVE-2026-23630 is a stored Cross-Site Scripting (XSS) vulnerability affecting Docmost versions 0.3.0 through 0.23.2. Attackers can inject malicious HTML/JavaScript into Mermaid diagrams, which are then unsafely rendered in the frontend, leading to arbitrary code execution for viewers. This vulnerability has a CVSS score of 5.4 (MEDIUM), indicating a low-complexity attack requiring user interaction, with potential for limited impact on confidentiality and integrity. The attack vector is network-based, and authentication is required. Currently, there is no evidence of active exploitation, and public exploit code (Metasploit, Nuclei, ExploitDB) is unavailable. However, the vulnerability has garnered significant community discussion, with 10 mentions, suggesting awareness among security researchers.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.3.0, < 0.24.0CPE matchmatch criteria | cpe:2.3:a:docmost:docmost:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.