CVE-2026-7890Disclosure(concretecms / concrete_cms)

LOWCVSS 6.4 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

concretecms CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes

Weakness type (CWE)

CWE-918

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

concrete_cms

Threat summary

1 mentions across 1 observed day

What's happening

Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Affected systems

Vendors

concretecms

Products

concrete_cms

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://www.cve.org/CVERecord?id=CVE-2026-7890

Full discourse1 post

CVE@CVEnew139d
Disclosure
CVE-2026-7890 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-inte… https://www.cve.org/CVERecord?id=CVE-2026-7890
Post summary
The post discloses CVE‑2026‑7890 affecting Concrete CMS 9.5.0 and earlier; the RSS Displayer block accepts arbitrary feed URLs and retrieves them server‑side without validation, potentially facilitating redirects or SSRF. No PoC, exploit, active exploitation, or patch information is provided.
00000160
57.5K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	concretecms	concrete_cms	-	-	-

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