CVE-2021-39136Cross-site scripting vulnerability in file upload
- 8.7HighCVSS base score
- 0.93%Exploitation in 30 daysEPSS · top 39% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
baserCMS is an open source content management system with a focus on Japanese language support. In affected versions there is a cross-site scripting vulnerability in the file upload function of the management system of baserCMS. Users are advised to update as soon as possible. No workaround are available to mitigate this issue.
Timeline
ID reserved
By GitHub_M
- 9 days later
· 9 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 |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
| 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)
- 0.93% · top 39% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Affected products
- affected < 4.5.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistbaserproject/basercmsGHSA-hgjr-632x-qpp3 (opens in a new tab)
References
References4
- https://github.com/baserproject/basercms/security/advisories/GHSA-hgjr-632x-qpp3 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/baserproject/basercms/commit/568d4cab5ba1cdee7bbf0133c676d02a98f6d7bc (opens in a new tab)x_refsource_MISCx_transferred
- https://basercms.net/security/JVN_14134801 (opens in a new tab)x_refsource_MISCx_transferred
- JVN#14134801 (opens in a new tab)third-party-advisoryx_refsource_JVNx_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-2021-1745 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-hgjr-632x-qpp3 (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-2021-39136)Record last updated .