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CVE-2025-6493

CodeMirror Markdown Mode markdown.js redos

A weakness has been identified in CodeMirror up to 5.65.20. Affected is an unknown function of the file mode/markdown/markdown.js of the component Markdown Mode. This manipulation causes inefficient regular expression complexity. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited. Upgrading to version 6.0 is able to address this issue. You should upgrade the affected component. Not all code samples mentioned in the GitHub issue can be found. The repository mentions, that "CodeMirror 6 exists, and is [...] much more actively maintained."

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Codemirror
Products
Codemirror
CVE-2020-7760

Regular Expression Denial of Service (ReDoS)

This affects the package codemirror before 5.58.2; the package org.apache.marmotta.webjars:codemirror before 5.58.2. The vulnerable regular expression is located in https://github.com/codemirror/CodeMirror/blob/cdb228ac736369c685865b122b736cd0d397836c/mode/javascript/javascript.jsL129. The ReDOS vulnerability of the regex is mainly due to the sub-pattern (s|/*.*?*/)*

CVSS 3.1 · 5.3 Medium EPSS 5.3% KEV · Not listed
Vendors
Codemirror Oracle
Products
Codemirror Application Express Enterprise Manager Express User Interface and 3 more