CVE-2019-14537
Access of Resource Using Incompatible Type ('Type Confusion') in yourls/yourls
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.
- Record
CVE-2019-14537- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-843
- Updated
- 2026-11-02
CVE List No score
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.
- Record
CVE-2019-14537- Updated
- 2026-11-02
EUVDEUVD-2019-0679 No score
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.
- Record
EUVD-2019-0679- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vf23-f26f-mjj9
Access of Resource Using Incompatible Type ('Type Confusion') in yourls/yourls
Impact
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the API component that can result in login bypass.
Patches
https://github.com/YOURLS/YOURLS/releases/tag/1.7.4 https://github.com/YOURLS/YOURLS/pull/2542
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14537
- https://github.com/Wocanilo/CVE-2019-14537
For more information
If you have any questions or comments about this advisory:
- Open an issue in YOURLS repository
- Record
GHSA-vf23-f26f-mjj9- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-843
- Updated
- 2026-11-02
OSV
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.
- Record
CVE-2019-14537- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-vf23-f26f-mjj9
Access of Resource Using Incompatible Type ('Type Confusion') in yourls/yourls
Impact
YOURLS through 1.7.3 is affected by a type juggling vulnerability in the API component that can result in login bypass.
Patches
https://github.com/YOURLS/YOURLS/releases/tag/1.7.4 https://github.com/YOURLS/YOURLS/pull/2542
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14537
- https://github.com/Wocanilo/CVE-2019-14537
For more information
If you have any questions or comments about this advisory:
- Open an issue in YOURLS repository
- Record
GHSA-vf23-f26f-mjj9- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-843
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
yourls/yourlsPackagist |
before 1.7.4 | 1.7.4 |
yourls/yourlsPackagist |
before 1.7.4, plus listed versions 1.7.11.7.21.7.3 |
1.7.4 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | Wocanilo/CVE-2019-14537 | 2019-08-07 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-14537 is a critical vulnerability (CVSS 9.8) in Yourls, published August 7, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 6.14%, the 93rd percentile. Fixed in yourls/yourls 1.7.4.
References
github.com/YOURLS/YOURLS/releases
security-garage.com/index.php/cves/cve-2019-14537-api-authentication-bypass-via-type-juggling
nvd.nist.gov/vuln/detail/CVE-2019-14537