9.8

CVE-2021-23369: handlebarsjs handlebars

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2021-23369DEBIAN-CVE-2021-23369CGA-6cjc-4xp2-v2f2
Published 12-04-2021Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2021-23369 is a critical (CVSS 9.8) vulnerability in handlebarsjs handlebars. EPSS estimates a 7.03% chance of exploitation in the next 30 days, higher than 94.1% of scored vulnerabilities. 4 public exploits are recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
7.03%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits4reference

Advisory lineage

Upstream 0 · Downstream 0 · Related 11
CGA-2FMF-WWVQ-6H59CGA-36J8-6JMC-8FCCCGA-5H6J-66G8-3G72CGA-7Q4Q-CG78-9MMWCGA-935R-HQF5-5H8WCGA-C3WC-JMPM-9GRP

Timeline

  1. 12-04-2021
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.

CVSS metrics

9 scores · 8 sources · 2 versions

EPSS trend

Probability

7.03%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 7.03% on 18-09-2026

18-09-202618-10-2026
EPSS score
7.03%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

4 found
  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

Show all 4 exploits
  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Chainguard71 products
  • code-serverAll versions (No fix recorded)
  • code-server-compatAll versions (No fix recorded)
  • commercial-gitlab-rails-ee-assets-19.1All versions (No fix recorded)
  • commercial-gitlab-rails-ee-assets-19.2All versions (No fix recorded)
  • commercial-gitlab-rails-ee-assets-19.3All versions (No fix recorded)
Wolfi2 products
  • code-serverAll versions (No fix recorded)
  • code-server-compatAll versions (No fix recorded)
Debian1 product
  • node-handlebars< 3:4.7.6+~4.1.0-2
Handlebarsjs1 product
Npm1 product
  • handlebars< 4.7.7
Org.webjars1 product
  • handlebars< 4.7.7
Org.webjars.bowergithub.wycats1 product
  • handlebars.js< 4.7.7
Org.webjars.npm1 product
  • handlebars< 4.7.7
Ubuntu1 product
  • node-handlebarsAll versions (No fix recorded)

9 vendors · 80 products

References

13 links
Show all 13 references