PT-2025-33816 · Mermaid+1 · Mermaid+1

Fourcube · Published 2025-08-19 · Updated 2026-04-24 · CVE-2025-54881

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Name of the Vulnerable Software and Affected Versions: Mermaid versions 10.9.0-rc.1 through 11.9.0

Description: Mermaid is a JavaScript-based diagramming and charting tool that utilizes Markdown-inspired text definitions and a renderer to create and modify diagrams. In the default configuration, user-supplied input for sequence diagram labels is passed to innerHTML during element size calculation, leading to a cross-site scripting (XSS) issue.

Recommendations: Update to a version beyond 11.9.0.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-54881

GHSA-7RQQ-PRVP-X9JH

Affected Products

Debian

Mermaid

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54881.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-54881 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-54881 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-54881 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-54881 · Security Note
• https://osv.dev/vulnerability/CVE-2025-54881 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7rqq-prvp-x9jh · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-54881 · Security Note
• https://github.com/mermaid-js/mermaid · Note
• https://github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh · Note
• https://github.com/mermaid-js/mermaid/commit/685516a85ec1df64cefd4fd15f26533be87d458e · Note
• https://github.com/mermaid-js/mermaid/commit/5c69e5fdb004a6d0a2abe97e23d26e223a059832 · Note
• https://twitter.com/dailycve/status/2047791496863134106 · Twitter Post
• https://t.me/CVEtracker/30369 · Telegram Post
• https://twitter.com/eternalky_u/status/1957876505574514944 · Twitter Post