CVE Explorer

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-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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c0642858bebdd3fc2a1cff4b9f7f7a2133e1f5a03a1b0f7e2e1fd2cec81e142a

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com/concretecms/concretecms","defaultStatus":"unaffected","product":"Concrete CMS","repo":"https://github.com/concretecms/concretecms","vendor":"Concrete CMS","versions":[{"lessThanOrEqual":"9.5.0","status":"affected","version":"5.0","versionType":"git"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:cf1080348d952b0dfa2123c8337705885dec66dc150e63e2d9ddd3f0befb9849 · sha256:6b785acbdbd474a8… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:cf1080348d952b0dfa2123c8337705885dec66dc150e63e2d9ddd3f0befb9849 · sha256:6b785acbdbd474a8… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-918","description":"CWE-918 Server-Side request forgery (SSRF)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:cf1080348d952b0dfa2123c8337705885dec66dc150e63e2d9ddd3f0befb9849 · sha256:6b785acbdbd474a8… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["release-notes"],"url":"https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:cf1080348d952b0dfa2123c8337705885dec66dc150e63e2d9ddd3f0befb9849 · sha256:6b785acbdbd474a8… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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