CVE-2021-29271

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-27 · updated 2026-06-17
Weakness: CWE-79

Description

remark42 before 1.6.1 allows XSS, as demonstrated by "Locator: Locator{URL:" followed by an XSS payload. This is related to backend/app/store/comment.go and backend/app/store/service/service.go.

Affected products

Remark42: before 1.6.1 — fixed in 1.6.1

How to fix

Upgrade to a fixed version: Remark42 1.6.1. Check the vendor advisory for mitigations.

References

https://github.com/umputun/remark42/compare/v1.6.0...v1.6.1
https://vuln.ryotak.me/advisories/19
https://github.com/umputun/remark42/compare/v1.6.0...v1.6.1
https://vuln.ryotak.me/advisories/19

Get alerted when CVE-2021-29271 or the next vulnerability affects your stack