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CVE-2026-8327

📛 CVE Title

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.

⬇ Download JSON ⚠ View as Threat

Description

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password  and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.  The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks 0x4c616e for reporting.

Overview

State
PUBLISHED
Assigner (CNA)
ConcreteCMS
CVSS severity
MEDIUM
CVSS score
CVSS 5.3 / 10 5.3 5.3 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Effective score
5.3 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-915, CWE-620, CWE-269
Reserved
2026-05-11
Published
2026-05-21 21:15 UTC
Last updated
2026-05-22 13:15 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/8xxx/CVE-2026-8327.json
Linked Threat
CVE-2026-8327 — CVE-2026-8327

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-21 22:16:50 UTC
NVD last modified
2026-05-21 22:16:50 UTC
EPSS score
0.0005 (probability of exploitation in next 30 days)
EPSS percentile
15.24% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 00:25 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-31362
Assigner
ConcreteCMS
Published
May 21, 2026, 9:15:31 PM
Updated
May 22, 2026, 1:15:58 PM
EUVD base score (CVSS 4.0)
5.3 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EUVD-reported EPSS
0.1800
Vendors
Concrete CMS
Products
Concrete CMS (5 ≤9.5.0)
Aliases
GHSA-wmw3-3fv3-h54w

ENISA description: Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password  and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking.  The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks 0x4c616e for reporting.

EUVD references (1)

Affected products (1)
VendorProductVersionsPlatforms
Concrete CMS Concrete CMS 5 (affected) —

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (15)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-8327.json.

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