VULNERABILITY INTELLIGENCE

CVE-2018-25110

CVSS score6.9 MEDIUM

EPSS probability0.61%

CISA KEVNot currently listed

Published2025-05-23

Last modified2026-06-17

CVSS vectorCVSS: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:X/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

Description

Marked prior to version 0.3.17 is vulnerable 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 vulnerability 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.

Weakness classification

CWE-1333: Inefficient Regular Expression Complexity

Primary references

596c5446-0ce5-4ba2-aa66-48b3b757a647 — Exploit, Third Party Advisory
596c5446-0ce5-4ba2-aa66-48b3b757a647 — Patch
596c5446-0ce5-4ba2-aa66-48b3b757a647 — Issue Tracking, Third Party Advisory
596c5446-0ce5-4ba2-aa66-48b3b757a647 — Issue Tracking, Patch