Vulnerability · Published Oct 23, 2025 · Assigned by jpcert
CVE-2025-62499
Medium 4.8
In plain English
A medium-severity cross-site scripting in Movable Type Advanced (Software Edition) from Six Apart Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.0)4.8Medium
Exploit odds (30 days)0.2%top 85.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Movable Type contains a stored cross-site scripting vulnerability in Edit CategorySet of ContentType page. If crafted input is stored by an attacker with "ContentType Management" privilege, an arbitrary script may be executed on the web browser of the user who accesses Edit CategorySet of ContentType page.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Six Apart Ltd. | Movable Type (Software Edition) | 8.4.0 to 8.4.3 (8.4 series)8.0.0 to 8.0.7 (8.0 series)7 r.5509 and earlier (7 series) |
| Six Apart Ltd. | Movable Type Advanced (Software Edition) | 8.4.0 to 8.4.3 (8.4 series)8.0.0 to 8.0.7 (8.0 series)7 r.5509 and earlier (7 series) |
| Six Apart Ltd. | Movable Type Premium (Software Edition) | 2.10 and earlier (2 series)1.67 and earlier (1 series) |
| Six Apart Ltd. | Movable Type Premium (Advanced Edition) (Software Edition) | 2.10 and earlier (2 series)1.67 and earlier (1 series) |
| Six Apart Ltd. | Movable Type (Cloud Edition) | 8.7.0 (8 series)7 r.5509 (7 series) |
| Six Apart Ltd. | Movable Type Premium (Cloud Edition) | 2.10 (2 series)1.67 (1 series) |
Weakness: CWE-79 · Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N