CVE Explorer

CVE-2026-8139

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.0 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5a381afd9f2fe540e28b8dcfec465789169df385862723b4820e947ff6e862b3

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:v2:42ed37f922c0c9de79592bfe2cf7ddcc98737835b189ce9c4e1017a034e4ac16 · sha256:99786c95420fbad3… · /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,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:42ed37f922c0c9de79592bfe2cf7ddcc98737835b189ce9c4e1017a034e4ac16 · sha256:99786c95420fbad3… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-79","description":"CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:42ed37f922c0c9de79592bfe2cf7ddcc98737835b189ce9c4e1017a034e4ac16 · sha256:99786c95420fbad3… · /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:v2:42ed37f922c0c9de79592bfe2cf7ddcc98737835b189ce9c4e1017a034e4ac16 · sha256:99786c95420fbad3… · /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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