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CVE-2019-25102

24
FAUCET Score

CVE-2019-25102 is a Regular Expression Denial of Service (ReDoS) vulnerability in simple-markdown version 0.6.0, specifically affecting the simple-markdown.js file. A specially crafted input string can lead to inefficient regular expression complexity, causing a denial of service. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity and without user interaction, resulting in high availability impact. While the exploit has been publicly disclosed, there is no evidence of active exploitation, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
0.6.0CPE matchmatch criteria
cpe:2.3:a:khanacademy:simple-markdown:0.6.0:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.10%
Probability of exploitation in next 30 days
EPSS Percentile
62.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0110 is in the 40th 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: simple-markdownFixed in: 0.6.1

Vendor Advisories (1)

npmGHSA-j533-2g8v-pmpghigh

Regular Expression Denial of Service in simple-markdown

Feb 12, 2023

References

github.com / ariabuckles/simple-markdown/commit/015a719bf5cdc561feea05500ecb3274ef609cd2
Patch
github.com / ariabuckles/simple-markdown/pull/73
ExploitIssue TrackingPatch
github.com / ariabuckles/simple-markdown/releases/tag/0.6.1
Release Notes
vuldb.com
Permissions RequiredThird Party Advisory
vuldb.com
Permissions RequiredThird Party Advisory