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CVE-2023-23630

21
FAUCET Score

CVE-2023-23630 is a Cross-Site Scripting (XSS) vulnerability affecting the Eta embedded JavaScript templating engine, specifically impacting users of its Express API. This medium-severity vulnerability (CVSS 6.1) allows for client-side code execution if user-supplied input is directly passed to res.render. While there is no evidence of active exploitation, public exploit code, or significant community discussion, users should upgrade to Eta version 2.0.0 or implement the workaround of sanitizing user input before rendering.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.0CPE matchmatch criteria
cpe:2.3:a:eta.js:eta:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 49th 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)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: etaFixed in: 2.0.0

Vendor Advisories (1)

npmGHSA-xrh7-m5pp-39r6high

XSS Attack with Express API

Jan 31, 2023

References

github.com / eta-dev/eta/commit/5651392462ee0ff19d77c8481081a99e5b9138dd
PatchThird Party Advisory
github.com / eta-dev/eta/releases/tag/v2.0.0
Release NotesThird Party Advisory
github.com / eta-dev/eta/security/advisories/GHSA-xrh7-m5pp-39r6
Third Party Advisory