Riskcovery

CVE-2026-21393

State
Published
Severity
4.8 Medium
Published
Feb 4, 2026
Updated
Feb 4, 2026
Reserved
Jan 29, 2026

Read the record on cve.org

Description

Movable Type contains a stored cross-site scripting vulnerability in Edit Comment. If crafted input is stored by an attacker, arbitrary script may be executed on a logged-in user's web browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well.

Scores

CVSSScoreVectorSource
4.04.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:Njpcert
3.05.4 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Njpcert

Weaknesses

  • CWE-79 Cross-site scripting (XSS)

Affected Products

ProductVersions
Movable Type (Software Edition)Six Apart Ltd.
  • 9.0.4 to 9.0.5 (9.0 series)Affected
  • 8.8.0 to 8.8.1 (8.8 series)Affected
  • 8.0.2 to 8.0.8 (8.0 series)Affected
Movable Type Advanced (Software Edition)Six Apart Ltd.
  • 9.0.4 to 9.0.5 (9.0 series)Affected
  • 8.8.0 to 8.8.1 (8.8 series)Affected
  • 8.0.2 to 8.0.8 (8.0 series)Affected
Movable Type Premium (Software Edition)Six Apart Ltd.
  • 9.0.4 (MTP 9.0 series)Affected
  • 2.13 and earlier (MTP 2 series)Affected
Movable Type Premium (Advanced Edition) (Software Edition)Six Apart Ltd.
  • 9.0.4 (MTP 9.0 series)Affected
  • 2.13 and earlier (MTP 2 series)Affected
Movable Type (Cloud Edition)Six Apart Ltd.
  • 9.0.5 (9 series)Affected
  • 8.8.1 (8 series)Affected
Movable Type Premium (Cloud Edition)Six Apart Ltd.
  • 9.0.5 (9 series)Affected
  • 2.12 (MTP 2 series)Affected

References

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