PT-2021-14269 · Unknown · Movable Type+4

Published 2021-08-26 · Updated 2021-09-01 · CVE-2021-20815

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: Movable Type versions 7 r.4903 and earlier Movable Type 6 Series versions 6.8.0 and earlier Movable Type Advanced 7 Series versions 7 r.4903 and earlier Movable Type Premium version 1.44 and earlier Movable Type Premium Advanced version 1.44 and earlier

Description: A cross-site scripting issue in the Edit Boilerplate screen of Movable Type allows remote attackers to inject arbitrary script or HTML via unspecified vectors.

Recommendations: For Movable Type versions 7 r.4903 and earlier, update to a version later than 7 r.4903. For Movable Type 6 Series versions 6.8.0 and earlier, update to a version later than 6.8.0. For Movable Type Advanced 7 Series versions 7 r.4903 and earlier, update to a version later than 7 r.4903. For Movable Type Premium version 1.44 and earlier, update to a version later than 1.44. For Movable Type Premium Advanced version 1.44 and earlier, update to a version later than 1.44. As a temporary workaround, consider restricting access to the Edit Boilerplate screen until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-20815

Affected Products

Movable Type

Movable Type 6 Series

Movable Type Advanced 7 Series

Movable Type Premium

Movable Type Premium Advanced

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-20815 · Security Note
• https://movabletype.org/news/2021/08/mt-780-681-released.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20815 · Vendor Advisory
• https://jvn.jp/en/jp/JVN97545738/index.html · Note
• https://t.me/cvenotify/20145 · Telegram Post
• https://t.me/cvenotify/20135 · Telegram Post
• https://t.me/cvenotify/20517 · Telegram Post