CVE-2018-13257

Name: CVE-2018-13257
Creator: NVD / NIST
Published: 2019-11-18T16:15:11.447+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2018-13257 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The bb-auth-provider-cas authentication module within Blackboard Learn 2018-07-02 is susceptible to HTTP host header spoofing during Central Authentication Service (CAS) service ticket validation, enabling a phishing attack from the CAS server login page.. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

The bb-auth-provider-cas authentication module within Blackboard Learn 2018-07-02 is susceptible to HTTP host header spoofing during Central Authentication Service (CAS) service ticket validation, enabling a phishing attack from the CAS server login page.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.21%

64.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Blackboard	Blackboard Learn	2018-07-02

References

https://github.com/gluxon/CVE-2018-13257Exploit, Third Party Advisory
https://github.com/gluxon/CVE-2018-13257Exploit, Third Party Advisory

Timeline

Published: Nov 18, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-13257?

How severe is CVE-2018-13257?

CVE-2018-13257 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2018-13257?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-13257?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST