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CVE-2021-3734
Improper Restriction of Rendered UI Layers or Frames in yourls/yourls
Medium6.5EPSS 0.40%
- Published
- Updated
- Reserved
- Assigned by
- @huntrdev
Description
yourls is vulnerable to Improper Restriction of Rendered UI Layers or Frames
Timeline
ID reserved
By @huntrdev
- 2 days later
· 2 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntrdevCNA (assigner) | 3.0 | Medium6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected unspecified – ≤ 1.8.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistyourls/yourlsGHSA-r6g8-jmj9-g945 (opens in a new tab)
References (2)
- https://huntr.dev/bounties/dd2e2dbe-efe5-49ec-be11-7a7e7c41debd (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fe (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-r6g8-jmj9-g945 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3734)Record last updated .