CVE-2026-34560

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 92% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application renders user-controlled input unsafely within the logs interface. If any stored XSS payload exists within logged data, it is rendered without proper output encoding. This issue becomes a Blind XSS scenario because the attacker does not see immediate execution. Instead, the payload is stored within application logs and only executes later when an administrator views the logs page. This issue has been patched in version 0.31.0.0.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
30.1%
KEV
Not listed

Published

April 1, 2026

Last Modified

April 13, 2026

Advisory Details (2)

Auto-updated May 20, 2026
Patch available. Sources: github.
github Patch Available

Logs Full Account Takeover for All-Roles & Privilege-Escalation via Stored DOM XSS · Advisory · ci4-cms-erp/ci4ms · GitHub

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-r4v5-rwr2-q7r4
generic

Release v0.31.0.0 - Major Security & Framework Update (CI 4.7.1 & Shield Integration) · ci4-cms-erp/ci4ms · GitHub

https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
ci4-cms-erp/ci4ms0.21.0 ... 0.28.6.0 (47 versions)0.31.0.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
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  1. 2026-06-21 14:56 UTCEPSS rescore
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  15. 2026-06-12 06:30 UTCEG score recompute
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  18. 2026-06-11 14:00 UTCEPSS rescore
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  20. 2026-06-10 22:06 UTCEG score recompute
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  24. 2026-06-10 09:31 UTCEG score recompute
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  26. 2026-06-10 01:24 UTCEG score recompute
  27. 2026-06-09 18:53 UTCEG score recompute
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  29. 2026-06-08 14:17 UTCEPSS rescore
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  31. 2026-06-08 12:44 UTCEG score recompute
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  36. 2026-06-07 15:25 UTCEPSS rescore
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  39. 2026-06-07 15:18 UTCEG score recompute
  40. 2026-06-07 11:14 UTCEG score recompute
  41. 2026-06-06 13:47 UTCEPSS rescore
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  73. 2026-05-20 11:22 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-34560?
CVE-2026-34560 is a critical vulnerability published on April 1, 2026. CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.0.0, the application renders user-controlled input unsafely within the logs interface. If any stored XSS payload exists within logged…
When was CVE-2026-34560 disclosed?
CVE-2026-34560 was first published in the National Vulnerability Database on April 1, 2026, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34560 actively exploited?
CVE-2026-34560 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34560?
CVE-2026-34560 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-34560?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34560, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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