CVE-2025-6493 describes a Regular Expression Denial of Service (ReDoS) vulnerability in CodeMirror versions up to 5.65.20, specifically within the markdown.js component of its Markdown Mode. This flaw allows a remote attacker to cause inefficient regular expression complexity, leading to a denial of service. The vulnerability is rated Medium severity (CVSS 5.3) due to its network-based attack vector and low impact on availability. While exploit code has been publicly disclosed, there is currently no evidence of active exploitation, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| N/A | CodeMirror | 5.65.0, 5.65.1, 5.65.10, 5.65.11, 5.65.12, 5.65.13, 5.65.14, 5.65.15, 5.65.16, 5.65.17, 5.65.18, 5.65.19, 5.65.2, 5.65.20, 5.65.3, 5.65.4, 5.65.5, 5.65.6, 5.65.7, 5.65.8, 5.65.9CNA affected |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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.