CVE-2021-23383

highpriority · attend · 51EPSS 0.045 · 91 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

4.51% (91st) EPSS

CVSS 7.5 · high

Is it mine?

11 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

The package handlebars before 4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.6–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · ENISA EU

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · report@snyk.ioexploitability 2.2 · impact 3.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-1321USprimaryCWE-1321USCWE-94US

exploits (2)

Public proof-of-concept and weaponised exploit code.

affected products (11)

Products and version ranges known to be affected.

IBM Business Automation Workflowall versionscert_bundDEcpe:/a:ibm:business_automation_workflow:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Tenable Security Nessus Network Monitor < 6.2.0all versionscert_bundDEcpe:/a:tenable:nessus_network_monitor:6.2.0
n/a handlebarsunspecified → 4.7.7enisa_euvdEU
Yehuda Katz Handlebars≤ 4.7.7fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 8fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU
handlebarsjs handlebars< 4.7.7nvdUScpe:2.3:a:handlebarsjs:handlebars:*:*:*:*:*:*:*:*
netapp e-series performance analyzerall versionsnvdUScpe:2.3:a:netapp:e-series_performance_analyzer:*:*:*:*:*:*:*:*
npm handlebars< 4.7.7osvUSpkg:npm/handlebars

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1646Red Hat OpenShift: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2021-06-28csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat OpenShift ausnutzen, um beliebigen Programmcode auszuführen.
WID-SEC-W-2023-3032Tenable Security Nessus Network Monitor: Mehrere SchwachstellenDeutsch2023-11-29csaf · cert_bundDE
Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in Tenable Security Nessus Network Monitor ausnutzen, um vertrauliche Informationen offenzulegen, beliebigen Code auszuführen oder Dateien zu manipulieren.
GHSA-765h-qjxv-5f44Prototype Pollution in handlebars2022-02-10ghsa · osvUS
The package handlebars before 4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2021-05-04modified 2026-10-09

related (708)

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The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.

+703 more

references (28)

External citations — patches, advisories, analysis.

scry

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