No exploitation reportedFix available

CVE-2023-23630

Q: Is CVE-2023-23630 actively exploited?

Active exploitation of CVE-2023-23630 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-23630?

CVE-2023-23630 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

No exploitation reported by the sources we read.

Published2023-02-01
Fixed in2.0.0
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Eta is an embedded JS templating engine that works inside Node, Deno, and the browser. XSS attack - anyone using the Express API is impacted. The problem has been resolved. Users should upgrade to version 2.0.0. As a workaround, don't pass user supplied things directly to `res.render`.

Timeline

dates in UTC

2023-02-0101:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-23630?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-23630?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Eta.js eta

Branch	Affected	Fixed in	Source
2.0	< 2.0.0	2.0.0	NVD · OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Eta.js eta to 2.0.0

Advisories and patches

github.comPatch
github.comRelease Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-03-10
OpenCVESSVC decisionnone—
CNACVSS 3.18.6read 2026-10-23
NVDCVSS 3.16.1read 2026-10-23
CNAweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score0.6 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2023-02-01
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-23630?

Is CVE-2023-23630 actively exploited?

Active exploitation of CVE-2023-23630 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-23630?

CVE-2023-23630 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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