CVE-2026-7890 (GCVE-0-2026-7890)
Vulnerability from cvelistv5 – Published: 2026-05-21 21:43 – Updated: 2026-05-22 12:54
VLAI
EPSS
VEX
Title
Concrete CMS 9.5.0 is vulnerable to SSRF via RSS Displayer Block
Summary
In Concrete CMS 9.5.0 and below, the RSS Displayer block accepts a feed URL from any page editor and fetches it server-side without validation enabling redirect-to-internal bypasses. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.1 with a vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-22 12:54 UTC
CWE
- CWE-918 - Server-Side request forgery (SSRF)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://documentation.concretecms.org/9-x/develop… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Concrete CMS | Concrete CMS |
Affected:
5.0 , ≤ 9.5.0
(git)
|
guessed |
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