What’s Vulnerable › Vulnerabilities

CVE-2021-3734: Improper Restriction of Rendered UI Layers or Frames in yourls/yourls

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-26 · updated 2026-06-17
• Weakness: CWE-1021

Description

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

Affected products

• yourls/yourls: through 1.8.1

References

• https://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fe
• https://huntr.dev/bounties/dd2e2dbe-efe5-49ec-be11-7a7e7c41debd
• https://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fe
• https://huntr.dev/bounties/dd2e2dbe-efe5-49ec-be11-7a7e7c41debd

Get alerted when CVE-2021-3734 or the next vulnerability affects your stack