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CVE-2021-3785Cross-site Scripting (XSS) - Stored in yourls/yourls
- 8.8HighCVSS base score
- 0.72%Exploitation in 30 daysEPSS · top 45% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
yourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Timeline
ID reserved
By @huntrdev
- 6 days later
· 6 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 | High8.8 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.72% · top 45% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected unspecified – < 1.8.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistyourls/yourlsGHSA-m9fq-c9hp-59g7 (opens in a new tab)
References
References2
- https://huntr.dev/bounties/b4085d13-54fa-4419-a2ce-1d780cc31638 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/yourls/yourls/commit/1d8e224ebabb8a4c75b97f026950ed710faab0ff (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)
- EUVD EUVD-2021-2092 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-m9fq-c9hp-59g7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-3785)Record last updated .