CVE-2017-15878 json
Cross-Site Scripting in keystone
published 2017-10-24 9 y ago modified 2026-06-17 4 mo ago also GHSA-7qcx-jmrc-h2rr , EUVD-2017-0346
- cvss
- 6.1
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.4%
- EPSS 3.4% chance of exploitation in 30 days, percentile 88%
- public exploits
- 1
- Exploit-DB
Summary
A cross-site scripting (XSS) vulnerability exists in fields/types/markdown/MarkdownType.js in KeystoneJS before 4.0.0-beta.7 via the Contact Us feature.
Patch / fix
- npm keystone 4.0.0
- keystonejs keystone 4.0.0
Timeline
- Published
- First public exploit (EDB-43054)
Exploit prediction
3.42% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-43054 KeystoneJS 4.0.0-beta.5 - Cross-Site Scripting webapps, 2017-10-25
- packetstormsecurity.com https://packetstormsecurity.com/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-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 |
| GitHub | 3.0 | 6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | keystone | <4.0.0 |
4.0.0 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/keystonejs/keystone/pull/4478
web, issue-tracking, patch, third-party-advisory
-
exploit-db.com
/exploits/43054/
exploit, issue-tracking, patch, third-party-advisory, vdb-entry
-
packetstormsecurity.com
/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-Cross-Site-Scripting.html
web, exploit, issue-tracking, patch, third-party-advisory, vdb-entry
-
securityfocus.com
/bid/101541
vdb-entry, web, third-party-advisory
-
blog.securelayer7.net
/keystonejs-open-source-penetration-testing-report/
issue-tracking, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2017-15878
advisory
-
github.com
/advisories/GHSA-7qcx-jmrc-h2rr
advisory
-
github.com
/keystonejs/keystone
package
-
securelayer7.net
/download/pdf/KeystoneJS-Pentest-Report-SecureLayer7.pdf
web
-
exploit-db.com
/exploits/43054
web
-
npmjs.com
/advisories/980
web
-
blog.securelayer7.net
/keystonejs-open-source-penetration-testing-report
web
Sources
- CVE List CVE-2017-15878
- GitHub Advisory GHSA-7qcx-jmrc-h2rr
- NVD CVE-2017-15878
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.