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CVE-2019-10905

26
FAUCET Score

CVE-2019-10905 is a high-severity vulnerability affecting Parsedown versions prior to 1.7.2, specifically when safe mode is enabled and HTML markup is disabled. Attackers could potentially execute arbitrary JavaScript by exploiting how Parsedown handles spaces in code block infostrings, which interferes with CSS class assignments. This vulnerability has a CVSS score of 8.1, indicating a high impact on confidentiality, integrity, and availability, with a high attack complexity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.2CPE matchmatch criteria
cpe:2.3:a:parsedown:parsedown:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.47%
Probability of exploitation in next 30 days
EPSS Percentile
71.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0147 is in the 29th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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 (1)

composerpatch availablevia ghsa
Product: erusev/parsedownFixed in: 1.7.2

Vendor Advisories (1)

composerGHSA-62m3-fc7f-jpp8high

Parsedown Class-Name Injection

Mar 26, 2022

References

github.com / erusev/parsedown/issues/699
ExploitIssue TrackingThird Party Advisory
github.com / erusev/parsedown/releases/tag/1.7.2
Release NotesThird Party Advisory