CVE-2017-15878
Cross-Site Scripting in keystone
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-15878- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-15878- Updated
- 2026-11-02
EUVDEUVD-2017-0346 No score
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.
- Record
EUVD-2017-0346- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-7qcx-jmrc-h2rr
Cross-Site Scripting in keystone
Versions of keystone prior to 4.0.0 are vulnerable to Cross-Site Scripting (XSS). The package fails to sanitize user input on the Contact Us page, allowing attackers to submit contact forms with malicious JavaScript in the message field. The output is not properly encoded leading an admin that opens new inquiry to execute the arbitrary JavaScript supplied in their browser.
Recommendation
Update to version 4.0.0 or later.
- Record
GHSA-7qcx-jmrc-h2rr- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2017-15878- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-7qcx-jmrc-h2rr
Cross-Site Scripting in keystone
Versions of keystone prior to 4.0.0 are vulnerable to Cross-Site Scripting (XSS). The package fails to sanitize user input on the Contact Us page, allowing attackers to submit contact forms with malicious JavaScript in the message field. The output is not properly encoded leading an admin that opens new inquiry to execute the arbitrary JavaScript supplied in their browser.
Recommendation
Update to version 4.0.0 or later.
- Record
GHSA-7qcx-jmrc-h2rr- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
keystonenpm |
before 4.0.0 | 4.0.0 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | KeystoneJS 4.0.0-beta.5 - Cross-Site Scripting | 2017-10-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-15878 is a medium vulnerability (CVSS 6.1) in Keystonejs Keystone, published October 24, 2017. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.42%, the 88th percentile. Fixed in keystone 4.0.0.
References
github.com/keystonejs/keystone/pull/4478
securityfocus.com/bid/101541
exploit-db.com/exploits/43054
blog.securelayer7.net/keystonejs-open-source-penetration-testing-report
packetstormsecurity.com/files/144756/KeystoneJS-4.0.0-beta.5-Unauthenticated-Stored-Cross-Site-Scripting.html
nvd.nist.gov/vuln/detail/CVE-2017-15878