PT-2025-22799 · Marked · Marked

Published 2025-05-23 · Updated 2025-05-26 · CVE-2018-25110

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Marked versions prior to 0.3.17

Description The issue is related to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in several regular expressions used for parsing HTML tags and markdown links. An attacker can exploit this by providing specially crafted markdown input, such as deeply nested or repetitively structured brackets or tag attributes, which cause the parser to hang and lead to a Denial of Service.

Recommendations For versions prior to 0.3.17, update to version 0.3.17 or later to resolve the issue. As a temporary workaround, consider restricting the use of markdown input to prevent exploitation until a patch is applied. Avoid using deeply nested or repetitively structured brackets or tag attributes in markdown links to minimize the risk of exploitation.

Exploit

Fix

DoS

Weakness Enumeration

CWE-1333

Related Identifiers

CVE-2018-25110

GHSA-P9WX-2529-FP83

Affected Products

Marked

References · 14

• 🔥 https://github.com/Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2018/CVE-2018-25110 · Exploit
• https://github.com/markedjs/marked/pull/1083 · Patch
• https://github.com/markedjs/marked/commit/20bfc106013ed45713a21672ad4a34df94dcd485 · Patch
• https://ubuntu.com/security/CVE-2018-25110 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-25110 · Security Note
• https://osv.dev/vulnerability/CVE-2018-25110 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-p9wx-2529-fp83 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-25110 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-25110 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-25110 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-25110 · Security Note
• https://github.com/markedjs/marked · Note
• https://github.com/markedjs/marked/issues/1070 · Note
• https://t.me/cvetracker/24536 · Telegram Post