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CVE-2026-23704

A non-administrative user can upload malicious files. When an administrator or the product accesses that file, an arbitrary script may be executed on the administrator's browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6ebf1524ed3667a2fa838b20482cc4389d1a971b2c782617082824758f595c62
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"product":"Movable Type (Cloud Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.5 (9 series)"},{"status":"affected","version":"8.8.1 (8 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/4

{"product":"Movable Type Premium (Cloud Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.5 (9 series)"},{"status":"affected","version":"2.12 (MTP 2 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/5

{"product":"Movable Type Premium (Advanced Edition) (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 (MTP 9.0 series)"},{"status":"affected","version":"2.13 and earlier (MTP 2 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/3

{"product":"Movable Type Advanced (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 to 9.0.5 (9.0 series)"},{"status":"affected","version":"8.8.0 to 8.8.1 (8.8 series)"},{"status":"affected","version":"8.0.2 to 8.0.8 (8.0 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/1

{"product":"Movable Type Premium (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 (MTP 9.0 series)"},{"status":"affected","version":"2.13 and earlier (MTP 2 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/2

{"product":"Movable Type (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 to 9.0.5 (9.0 series)"},{"status":"affected","version":"8.8.0 to 8.8.1 (8.8 series)"},{"status":"affected","version":"8.0.2 to 8.0.8 (8.0 series)"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"baseScore":6.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/metrics/0/cvssV3_0

{"metric":{"baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/metrics/1/cvssV4_0

Affected products and versions

6 source assertions
{"product":"Movable Type (Cloud Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.5 (9 series)"},{"status":"affected","version":"8.8.1 (8 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/4
{"product":"Movable Type Premium (Cloud Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.5 (9 series)"},{"status":"affected","version":"2.12 (MTP 2 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/5
{"product":"Movable Type Premium (Advanced Edition) (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 (MTP 9.0 series)"},{"status":"affected","version":"2.13 and earlier (MTP 2 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/3
{"product":"Movable Type Advanced (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 to 9.0.5 (9.0 series)"},{"status":"affected","version":"8.8.0 to 8.8.1 (8.8 series)"},{"status":"affected","version":"8.0.2 to 8.0.8 (8.0 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/1
{"product":"Movable Type Premium (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 (MTP 9.0 series)"},{"status":"affected","version":"2.13 and earlier (MTP 2 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/2
{"product":"Movable Type (Software Edition)","vendor":"Six Apart Ltd.","versions":[{"status":"affected","version":"9.0.4 to 9.0.5 (9.0 series)"},{"status":"affected","version":"8.8.0 to 8.8.1 (8.8 series)"},{"status":"affected","version":"8.0.2 to 8.0.8 (8.0 series)"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"baseScore":6.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/metrics/0/cvssV3_0
{"metric":{"baseScore":5.1,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/metrics/1/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-434","description":"Unrestricted upload of file with dangerous type","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://jvn.jp/en/jp/JVN45405689/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/references/2
{"url":"https://movabletype.org/news/2026/02/mt-906-released.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/references/0
{"url":"https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ed0876455940db84d5790f463b69fe42079d30cf949b6aa8db8cc9ea9304286f · sha256:3ba3fb3df80c9335… · /containers/cna/references/1

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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