CVE-2021-20810

MEDIUM EPSS 55.3%
Published Aug 26, 20214y ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Aug 26, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

Cross-site scripting vulnerability in Website Management screen of Movable Type (Movable Type 7 r.4903 and earlier (Movable Type 7 Series), Movable Type 6.8.0 and earlier (Movable Type 6 Series), Movable Type Advanced 7 r.4903 and earlier (Movable Type Advanced 7 Series), Movable Type Premium 1.44 and earlier, and Movable Type Premium Advanced 1.44 and earlier) allows remote attackers to inject arbitrary script or HTML via unspecified vectors.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
55.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 5

VendorProductVersionRange
sixapartmovable_type* ≤1.44
sixapartmovable_type* ≤1.44
sixapartmovable_type*≥6.0  –  ≤6.8.0
sixapartmovable_type*≥7.0  –  <7.8.0
sixapartmovable_type*≥7.0  –  <7.8.0

References 2

  • jvn.jp https://jvn.jp/en/jp/JVN97545738/index.html
    Third Party Advisory
  • movabletype.org https://movabletype.org/news/2021/08/mt-780-681-released.html
    Release NotesVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.