CVE-2021-28935 json
CMS Made Simple (CMSMS) 2.2.15 allows authenticated XSS via the /admin/addbookmark.php script through the Site Admin > My Preferences > Tit…
published 2021-03-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15586
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 1
- Exploit-DB
Summary
CMS Made Simple (CMSMS) 2.2.15 allows authenticated XSS via the /admin/addbookmark.php script through the Site Admin > My Preferences > Title field.
Timeline
- Published
- First public exploit (EDB-49793)
Exploit prediction
1.57% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-49793 CMS Made Simple 2.2.15 - 'title' Cross-Site Scripting (XSS) webapps, 2021-04-22
- dev.cmsmadesimple.org http://dev.cmsmadesimple.org/bug/view/12432 referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/162287/CMS-Made-Simple-2.2.15-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
dev.cmsmadesimple.org
/bug/view/12432
exploit, issue-tracking, vendor-advisory
-
packetstormsecurity.com
/files/162287/CMS-Made-Simple-2.2.15-Cross-Site-Scripting.html
exploit, third-party-advisory, vdb-entry
Sources
- CVE List CVE-2021-28935
- NVD CVE-2021-28935
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.