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CVE-2026-34567

31
FAUCET Score

CVE-2026-34567 is a critical stored Cross-Site Scripting (XSS) vulnerability impacting CI4MS versions prior to 0.31.0.0. An authenticated attacker can exploit this by injecting malicious JavaScript into blog post categories due to insufficient input sanitization. Rated with a CVSS score of 9.1 (CRITICAL), the vulnerability has a low attack complexity and can result in high confidentiality impact, potentially allowing for session hijacking or data theft. There is currently no evidence of active exploitation or public exploit code, though the issue has been noted in community discussions.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.31.0.0CPE matchmatch criteria
cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.1
Impact Score
5.3
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
18.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 7th percentile among its peer group of 265 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.6 Bluesky, 0.3 Mastodon, and 1.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: ci4-cms-erp/ci4msFixed in: 0.31.0.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-r33w-c82v-x5v7critical

CI4MS: Blogs Posts (Categories) Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS

Apr 1, 2026

References

github.com / ci4-cms-erp/ci4ms/releases/tag/0.31.0.0
Release Notes
github.com / ci4-cms-erp/ci4ms/security/advisories/GHSA-r33w-c82v-x5v7
ExploitVendor Advisory