CVE-2026-30879

baserCMS: Cross-site scripting vulnerability in blog post

MEDIUM

6.1

CVSS Score

Published: March 31, 2026 at 12:45 AM UTC

Updated: June 17, 2026 at 10:33 AM UTC

2 products affected across 2 vendorsBasercmsBasercms

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Severity

MEDIUM6.1

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Basercms · Basercms

95%

v < 5.2.3

Basercms · Baserprojectcomposer

60%

v < 5.2.3

Affected range stops below 5.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory

Source: cverecord

https://github.com/baserproject/basercms/security/advisories/GHSA-jmq3-x8q7-j9qm

x_refsource_MISCVendor Advisory

Source: cverecord

https://basercms.net/security/JVN_20837860

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/baserproject/basercms/releases/tag/5.2.3

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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