CVE-2021-23784: Cross-site Scripting (XSS)

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-11-03 · updated 2026-06-17
Weakness: CWE-79

Description

This affects the package tempura before 0.4.0. If the input to the esc function is of type object (i.e an array) it is returned without being escaped/sanitized, leading to a potential Cross-Site Scripting vulnerability.

Affected products

tempura: before 0.4.0 — fixed in 0.4.0

How to fix

Upgrade to a fixed version: tempura 0.4.0. Check the vendor advisory for mitigations.

References

https://github.com/lukeed/tempura/commit/58a5c3671e2f36b26810e77ead9e0dd471902f9b
https://github.com/lukeed/tempura/releases/tag/v0.4.0
https://snyk.io/vuln/SNYK-JS-TEMPURA-1569633
https://github.com/lukeed/tempura/commit/58a5c3671e2f36b26810e77ead9e0dd471902f9b
https://github.com/lukeed/tempura/releases/tag/v0.4.0
https://snyk.io/vuln/SNYK-JS-TEMPURA-1569633

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