XSS in Movabletype Movable Type
CVE-2021-20665
Cross-site scripting vulnerability in in Add asset screen of Contents field 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 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 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-2021-20665?
- CVE-2021-20665 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-2021-20665?
- Medium severity. CVSS v3 base score is 6.1 out of 10.