What is CVE-2023-29827?

CVE-2023-29827 is a critical-severity vulnerability in Ejs, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.8/10. Published 2023-05-04.

How severe is CVE-2023-29827?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-29827 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ejs

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.

EPSS: 0.056 (92.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ejs
N/a — versions n/a

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Patch, Issue Tracking)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2023-29827?: CVE-2023-29827 is a critical-severity vulnerability in Ejs, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.8/10. Published 2023-05-04.
How severe is CVE-2023-29827?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-29827 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.