PT-2025-26570 · Unknown+1 · Codemirror+1

Dayshift · Published 2025-06-22 · Updated 2025-06-24 · CVE-2025-6493

Positive Technologies (AI Summary)

CVSS v4.0

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: CodeMirror versions up to 5.17.0

Description: A vulnerability was found in the Markdown Mode component, specifically in the file mode/markdown/markdown.js, leading to inefficient regular expression complexity. This issue can be exploited remotely. The problem is related to some unknown functionality of the component. It is noted that CodeMirror 6 is more actively maintained, implying that the vulnerable version may be outdated.

Recommendations: For CodeMirror versions up to 5.17.0, consider updating to a newer version, as CodeMirror 6 is mentioned to be more actively maintained, which may include fixes for the issue. As a temporary workaround, consider restricting the use of the Markdown Mode component until a patch is available.

Exploit

Fix

Resource Exhaustion

DoS

Weakness Enumeration

CWE-400

CWE-1333

Related Identifiers

CVE-2025-6493

Affected Products

Codemirror

Debian

References · 13

• 🔥 https://github.com/codemirror/codemirror5/issues/7128 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-6493 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-6493 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-6493 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-6493 · Security Note
• https://ubuntu.com/security/CVE-2025-6493 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-6493 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-6493 · Vendor Advisory
• https://twitter.com/CVEnew/status/1936915941096579176 · Twitter Post
• https://vuldb.com/?submit.598875 · Note
• https://vuldb.com/?id.313610 · Note
• https://t.me/cvetracker/26808 · Telegram Post
• https://vuldb.com/?ctiid.313610 · Note