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CVE-2018-25110

20
FAUCET Score

CVE-2018-25110 describes a Regular Expression Denial of Service (ReDoS) vulnerability in the 'marked' markdown parser, affecting versions prior to 0.3.17. This flaw allows an attacker to provide specially crafted markdown input, such as deeply nested brackets or tag attributes, which causes the parser to enter a state of catastrophic backtracking and become unresponsive. With a CVSS score of 7.5 (HIGH), this vulnerability has a network attack vector, low attack complexity, and can lead to a complete denial of service for affected systems. There is currently no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.3.17CPE matchmatch criteria
cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

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: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

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 18th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: markedFixed in: 0.3.17

Vendor Advisories (1)

npmGHSA-p9wx-2529-fp83medium

Marked allows Regular Expression Denial of Service (ReDoS) attacks

May 23, 2025

References

github.com / Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2018/CVE-2018-25110
ExploitThird Party Advisory
github.com / markedjs/marked/commit/20bfc106013ed45713a21672ad4a34df94dcd485
Patch
github.com / markedjs/marked/issues/1070
Issue TrackingThird Party Advisory
github.com / markedjs/marked/pull/1083
Issue TrackingPatch