CVE-2026-23852 is a critical stored Cross-Site Scripting (XSS) vulnerability affecting SiYuan personal knowledge management systems prior to version 3.5.4. An attacker can inject malicious HTML into the 'icon' attribute via the API, which is then rendered unsanitized. This vulnerability has a CVSS score of 9.6 (CRITICAL), indicating it can be exploited remotely with low complexity, requiring user interaction, and leading to high impact on confidentiality, integrity, and availability, including potential Remote Code Execution (RCE) in desktop environments. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in CISA's KEV catalog, but it has garnered significant community discussion with 10 mentions.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.5.4CPE matchmatch criteria | cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P/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, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.