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CVE-2018-15504

25
FAUCET Score

CVE-2018-15504 is a NULL pointer dereference vulnerability affecting Embedthis GoAhead versions prior to 4.0.1 and Appweb versions prior to 7.0.2. This flaw occurs when the server improperly handles HTTP request fields related to time, such as If-Modified-Since, if a month value greater than 11 is provided. Rated 7.5 HIGH, this vulnerability is network-exploitable with low attack complexity, requiring no user interaction or privileges, and can lead to a denial of service. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.0.2CPE matchmatch criteria
cpe:2.3:a:embedthis:appweb:*:*:*:*:*:*:*:*
< 4.0.1CPE matchmatch criteria
cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:-:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:d10:*:*:*:*:*:*
12.1x46CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.1x46:d15:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.77%
Probability of exploitation in next 30 days
EPSS Percentile
84.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0277 is in the 73rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / embedthis/appweb/commit/66067ae6d1fa08b37a270e7dc1821df52ed2daef
PatchThird Party Advisory
github.com / embedthis/appweb/issues/605
ExploitPatchThird Party Advisory
github.com / embedthis/goahead/issues/264
ExploitPatchThird Party Advisory
supportportal.juniper.net / s/article/2019-07-Security-Bulletin-Junos-OS-J-Web-Denial-of-Service-due-to-multiple-vulnerabilities-in-Embedthis-Appweb-Server
Third Party Advisory
supportportal.juniper.net / s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved
Third Party Advisory