CVE-2018-15504

Name: CVE-2018-15504
Creator: NVD / NIST
Published: 2018-08-18T03:29:00.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.77%

Last modified Jun 17, 2026

CVE-2018-15504 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. The server mishandles some HTTP request fields associated with time, which results in a NULL pointer dereference, as demonstrated by If-Modified-Since or If-Unmodified-Since with a month greater than 11.. EPSS estimates a 2.77% chance of exploitation in the next 30 days.

Description

An issue was discovered in Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2. The server mishandles some HTTP request fields associated with time, which results in a NULL pointer dereference, as demonstrated by If-Modified-Since or If-Unmodified-Since with a month greater than 11.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.77%

84.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions	Update
Embedthis	Appweb	< 7.0.2	—
Embedthis	Goahead	< 4.0.1	—
Juniper	Junos	12.1x46	—
Juniper	Junos	12.3x48	—
Juniper	Junos	15.1x49	—
Juniper	Junos	12.3	—
Juniper	Junos	15.1	—
Juniper	Junos	15.1x53	—
Juniper	Junos	16.1	—
Juniper	Junos	16.2	—
Juniper	Junos	17.1	—
Juniper	Junos	17.2	R2
Juniper	Junos	17.3	—
Juniper	Junos	17.4	—
Juniper	Junos	18.1	—
Juniper	Junos	18.2	—
Juniper	Junos	18.3	—
Juniper	Junos	18.4	—

References

https://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daefPatch, Third Party Advisory
https://github.com/embedthis/appweb/issues/605Exploit, Patch, Third Party Advisory
https://github.com/embedthis/goahead/issues/264Exploit, Patch, Third Party Advisory
https://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-ServerThird Party Advisory
https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolvedThird Party Advisory
https://github.com/embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daefPatch, Third Party Advisory
https://github.com/embedthis/appweb/issues/605Exploit, Patch, Third Party Advisory
https://github.com/embedthis/goahead/issues/264Exploit, Patch, Third Party Advisory
https://supportportal.juniper.net/s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-ServerThird Party Advisory
https://supportportal.juniper.net/s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolvedThird Party Advisory

Timeline

Published: Aug 18, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-15504?

How severe is CVE-2018-15504?

CVE-2018-15504 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.77% probability of exploitation in the next 30 days.

How do I fix CVE-2018-15504?

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-2018-15504?

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

Scan your code now

Source: NVD / NIST