Serendipity before 2.1.5 has XSS via EXIF data that is mishandled in the templates/2k11/admin/media_choose.tpl Editor Preview feature or the templates/2k11/admin/media_items.tpl Media Library feature.
https://www.openwall.com/lists/oss-security/2019/05/03/3
https://github.com/s9y/Serendipity/issues/598
http://www.openwall.com/lists/oss-security/2019/05/10/1
https://blog.s9y.org/archives/282-Serendipity-2.1.5-released.html
Source: Mitre, NVD
Published: 2019-05-09
Updated: 2019-05-10
Base Score: 4.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 6.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00518