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TI-2021-02667 Aliases CVE-2021-3734GHSA-r6g8-jmj9-g945

Improper Restriction of Rendered UI Layers or Frames in yourls/yourls

Priority LOW 38CWE-1021Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing, Tampering
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1021 and CWE-352.

Summary

yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames

Why it matters now

EPSS 0.00405 35th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
yourlsyourls/yourlsup to 1.8.1—No fix listedCNA
—yourls/yourls (Packagist)up to 1.8.1—No fix listedGHSA-r6g8-jmj9-g945
  • yourls/yourls Vendoryourls Affected up to 1.8.1 Fixed in — No fix listed CNA
  • yourls/yourls (Packagist) Vendor— Affected up to 1.8.1 Fixed in — No fix listed GHSA-r6g8-jmj9-g945

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yourls:yourls:*:*:*:*:*:*:*:*up to 1.8.1Vulnerableyourls
  • cpe:2.3:a:yourls:yourls:*:*:*:*:*:*:*:* Versions up to 1.8.1 Vulnerable ·yourls

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3734
  2. 2026-10-03 Alias added: GHSA-r6g8-jmj9-g945

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2019-10834 YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass. CVSS 3.0CRITICAL 9.8
  • TI-2022-00039 Cross-Site Request Forgery (CSRF) in yourls/yourls CVSS 3.1HIGH 7.4
  • TI-2021-02714 Cross-site Scripting (XSS) - Reflected in yourls/yourls CVSS 3.1MEDIUM 6.1
  • TI-2021-02716 Cross-site Scripting (XSS) - Stored in yourls/yourls CVSS 3.1MEDIUM 5.4
  • TI-2020-16654 Multiple Stored Cross Site Scripting (XSS) vulnerabilities exist in the YOURLS Admin… CVSS 3.1MEDIUM 5.4
  • TI-2011-03381 Your Own URL Shortener (YOURLS) 1.5 allows remote attackers to obtain sensitive… CVSS 2.0MEDIUM 5.0
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences