Vulnerability Details : CVE-2021-20811
Cross-site scripting vulnerability in List of Assets 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.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-20811
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:*
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium_advanced:*:*:*
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:*
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium:*:*:*
- cpe:2.3:a:sixapart:movable_type:*:*:*:*:-:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20811
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 48 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20811
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2021-20811
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20811
-
https://jvn.jp/en/jp/JVN97545738/index.html
JVN#97545738: Multiple cross-site scripting vulnerabilities in Movable TypeThird Party Advisory
-
https://movabletype.org/news/2021/08/mt-780-681-released.html
MovableType.org – News: Movable Type 7 r.5001 (v7.8.0), v6.8.1 releasedRelease Notes;Vendor Advisory
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