CVE•Published 2026-05-21•Modified 2026-07-23•0 articles on news•5 live references•NVD data

CVE-2026-7887Concretecms · Concrete_cms

Vulnerability data via NVD (ingested)

CVSS v3.1

6.4

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 93% of all CVEs

Weaknesses (CWE)

CWE-1287Improper Validation of Specified Type of Input

Description

For Concrete CMS 9.5.0 and below, OAuth 2.0 Authorization-Code Handler Bypasses Account Status. A user with uIsActive=0 (suspended, banned, terminated employee) can still authenticate via OAuth and receive valid API tokens. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N. Thanks 0x4c616e for reporting.

Timeline

Published 2026-05-21

Modified 2026-07-23

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-7887

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Concretecms Concrete Cms"

All exposed Concretecms Concrete Cms instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Concrete Cms"

HTTP body or banner mentions "Concrete Cms" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-7887