XSS in Movabletype Movable Type
CVE-2021-20663
Cross-site scripting vulnerability in in Role authority setting screen of Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier allows remote attackers to inject an arbitrary script via unspecified vectors.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (56.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
Affected products
- Movabletype Movable Type
- Movabletype Movable Type Advanced
- Movabletype Movable Type Premium
- Movabletype Movable Type Premium Advanced
- Six Apart Ltd. Movable Type — versions Movable Type 7 r.4705 and earlier (Movable Type 7 Series), Movable Type Advanced 7 r.4705 and earlier (Movable Type Advanced 7 Series), Movable Type 6.7.5 and earlier (Movable Type 6.7 Series), Movable Type Premium 1.39 and earlier, and Movable Type Premium Advanced 1.39 and earlier
Weakness classification (CWE)
References
- jvn.jp/en/jp/JVN66542874/index.html (Third Party Advisory)
- movabletype.org/news/2021/02/mt-760-676-released.html (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-20663?
- CVE-2021-20663 is a medium-severity vulnerability in Movabletype Movable Type, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-05.
- How severe is CVE-2021-20663?
- Medium severity. CVSS v3 base score is 6.1 out of 10.