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CVE-2019-10010

21
FAUCET Score

CVE-2019-10010 is a cross-site scripting (XSS) vulnerability in the PHP League CommonMark library versions prior to 0.18.3, allowing remote attackers to inject unsafe links into rendered HTML through double-encoded HTML entities. This vulnerability has a CVSS score of 6.1 (Medium), indicating it can be exploited remotely with low complexity, requiring user interaction, and potentially leading to low impact on confidentiality and integrity. There is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage, suggesting low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.18.3CPE matchmatch criteria
cpe:2.3:a:thephpleague:commonmark:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 73rd percentile among its peer group of 26,221 CVEs.

Social Chatter

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

composerpatch availablevia ghsa
Product: league/commonmarkFixed in: 0.18.3
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-3v43-877x-qgmqmedium

Moderate severity vulnerability that affects league/commonmark

Sep 17, 2019

References

github.com / thephpleague/commonmark/issues/353
ExploitIssue TrackingPatchThird Party Advisory
github.com / thephpleague/commonmark/releases/tag/0.18.3
Release NotesThird Party Advisory