CVE-2026-7890
Concrete CMS 9.5.0 is vulnerable to SSRF via RSS Displayer Block
- State
- Published
- Severity
- 2.1 Low
- Published
- May 21, 2026
- Updated
- May 22, 2026
- Reserved
- May 5, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | 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 | ConcreteCMS |
Weaknesses
- CWE-918 Server-Side request forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
Concrete CMSConcrete CMS |
|
References
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