Back
CVE-2021-4072Cross-site Scripting (XSS) - Stored in elgg/elgg
- 9.0CriticalCVSS base score
- 0.72%Exploitation in 30 daysEPSS · top 46% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
elgg is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Timeline
ID reserved
By @huntrdev
- 18 days later
· 18 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 | Critical9.0 | CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/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 46% of all CVEs (12 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.0.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistelgg/elggGHSA-2xw8-j43j-5vxp (opens in a new tab)
References
References2
- https://huntr.dev/bounties/74034253-732a-4251-a0f9-eca5f576c955 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/elgg/elgg/commit/c30b17bf75256ed3fcc84e2083147cc3951423d0 (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-2022-0429 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-2xw8-j43j-5vxp (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-2021-4072)Record last updated .