CVE-2026-30879 json
baserCMS: Cross-site scripting vulnerability in blog post
published 2026-03-31 7 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-17263 , GHSA-jmq3-x8q7-j9qm
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
baserCMS is a website development framework. Prior to version 5.2.3, baserCMS has a cross-site scripting vulnerability in blog posts. This issue has been patched in version 5.2.3.
Patch / fix
- packagist baserproject/basercms 5.2.3
- basercms basercms 5.2.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | baserproject/basercms | <5.2.3 |
5.2.3 |
Affected products
- baserproject basercms
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/baserproject/basercms/security/advisories/GHSA-jmq3-x8q7-j9qm
web, vendor-advisory
-
basercms.net
/security/JVN_20837860
web, vendor-advisory
-
github.com
/baserproject/basercms/releases/tag/5.2.3
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-30879
advisory
-
github.com
/baserproject/basercms
package
Sources
- CVE List CVE-2026-30879
- GitHub Advisory GHSA-jmq3-x8q7-j9qm
- NVD CVE-2026-30879
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.