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CVE-2020-15138

25
FAUCET Score

CVE-2020-15138 describes a Cross-Site Scripting (XSS) vulnerability in the easing preview feature of the Prism Previewers plugin, affecting Prism versions 1.1.0 and newer when used with specific Previewers plugin versions. This flaw allows attackers to execute arbitrary code in Safari and Internet Explorer browsers. With a CVSS score of 7.5 (HIGH), it requires user interaction and high attack complexity, but could lead to high confidentiality impact and low integrity/availability impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.1.0, < 1.21.0CPE matchmatch criteria
cpe:2.3:a:prismjs:previewers:*:*:*:*:*:prismjs:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.6
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.04%
Probability of exploitation in next 30 days
EPSS Percentile
79.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0204 is in the 53rd percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.6 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: prismjsFixed in: 1.21.0

Vendor Advisories (2)

npmGHSA-wvhm-4hhf-97x9high

Cross-Site Scripting in Prism

Aug 7, 2020
redhatCVE-2020-15138Moderate

nodejs-prismjs: xss vulnerability that allows attackers to execute arbitrary code

Aug 7, 2020

References

github.com / PrismJS/prism/pull/2506/commits/7bd7de05edf71112a3a77f87901a2409c9c5c20c
PatchThird Party Advisory
github.com / PrismJS/prism/security/advisories/GHSA-wvhm-4hhf-97x9
Third Party Advisory
prismjs.com / plugins/previewers
Vendor Advisory