How severe is CVE-2023-29827?

CVE-2023-29827 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-29827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-29827?

CVE-2023-29827 affects Ejs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-29827?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-29827 published?

CVE-2023-29827 was published on 2023-05-04 and last updated on 2026-06-17.

CVE-2023-29827

CVE-2023-29827 is a critical-severity vulnerability in Ejs with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Ejs
Published: 2023-05-04
Last modified: 2026-06-17

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.

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.
How severe is CVE-2023-29827?: CVE-2023-29827 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-29827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-29827?: CVE-2023-29827 affects Ejs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-29827?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-29827 published?: CVE-2023-29827 was published on 2023-05-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ejs:ejs:*:*:*:*:*:node.js:*:*

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