CVE-2018-18307 json
Withdrawn Advisory: AlchemyCMS is vulnerable to stored XSS via the /admin/pictures image field
published 2018-10-16 8 y ago modified 2026-09-10 1 mo ago also GHSA-7mj4-2984-955f , EUVD-2022-3035
- cvss
- 6.1
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
A Stored XSS vulnerability has been discovered in version 4.1.0 of AlchemyCMS via the /admin/pictures image field. NOTE: the vendor's position is that this is not a valid report: "The researcher used an authorized cookie to perform the request to a password-protected route. Without that session cookie, the request would have been rejected as unauthorized."
Exploit prediction
1.70% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- packetstormsecurity.com http://packetstormsecurity.com/files/149787/Alchemy-CMS-4.1-Stable-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
packetstormsecurity.com
/files/149787/Alchemy-CMS-4.1-Stable-Cross-Site-Scripting.html
web, exploit, third-party-advisory, vdb-entry
-
github.com
/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/pictures_controller.rb#L5
web
-
github.com
/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/resources_controller.rb#L21
web
-
github.com
/AlchemyCMS/alchemy_cms/blob/4.1-stable/app/controllers/alchemy/admin/base_controller.rb#L15
web
-
exploit-db.com
/exploits/45601
web
-
nvd.nist.gov
/vuln/detail/CVE-2018-18307
advisory
-
github.com
/AlchemyCMS/alchemy_cms
package
-
github.com
/rubysec/ruby-advisory-db/blob/master/gems/alchemy_cms/CVE-2018-18307.yml
web
Sources
- CVE List CVE-2018-18307
- GitHub Advisory GHSA-7mj4-2984-955f
- NVD CVE-2018-18307
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.