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ExploitedNot in CISA KEV yetFix available

CVE-2023-29827

Exploitation confirmed. First attested on 2026-09-18 by GCVE · previdian, GCVE · shadowserver.

  • Published2023-05-04
  • WeaknessCWE-74

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

ejs v3.1.9 is vulnerable to server-side template injection. If the ejs file is controllable, template injection can be implemented through the configuration settings of the closeDelimiter parameter. NOTE: this is disputed by the vendor because the render function is not intended to be used with untrusted input.

Timeline

dates in UTC
  1. 2023-05-0414:15CVE publishedNVD
  2. 2026-09-18Listed as exploited by GCVEGCVE
  3. 2026-09-18Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-11-03 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-2023-29827?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-29827?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Ejs
BranchAffectedFixed in
3.1+≥ 3.1.9no fix published

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

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • node-ejsDebian:14all versions · no fixed version listed
  • node-ejsDebian:13all versions · no fixed version listed
  • node-ejsDebian:12all versions · no fixed version listed

Full record on NVD

Fix

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-05-04
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-j5pp-6f4w-r5r6

Frequently asked questions

What is CVE-2023-29827?

ejs v3.1.9 is vulnerable to server-side template injection. If the ejs file is controllable, template injection can be implemented through the configuration settings of the closeDelimiter parameter. NOTE: this is disputed by the vendor because the render function is not intended to be used with untrusted input.

Is CVE-2023-29827 actively exploited?

A proof-of-concept exploit exists for CVE-2023-29827, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2023-29827?

CVE-2023-29827 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record