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CVE-2018-15505

26
FAUCET Score

CVE-2018-15505 is a denial-of-service vulnerability affecting Embedthis GoAhead before 4.0.1 and Appweb before 7.0.2, as well as various Juniper products utilizing these components. It arises from a NULL pointer dereference triggered by a specially crafted HTTP POST request containing an incomplete IPv6 address in the "Host" header. This vulnerability has a CVSS v3.1 score of 7.5 (HIGH), indicating a network-exploitable flaw with low attack complexity that can lead to a complete loss of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage 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:*:*:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:-:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r1:*:*:*:*:*:*
12.3CPE matchmatch criteria
cpe:2.3:o:juniper:junos:12.3:r10:*:*:*:*:*:*

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
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 66th percentile among its peer group of 51,506 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/16e6979c82297d5fc4f8661e7ada975f51e4dfa9
PatchThird Party Advisory
github.com / embedthis/appweb/issues/605
Broken LinkExploitIssue TrackingPatchThird Party Advisory
github.com / embedthis/goahead/issues/264
Broken LinkExploitIssue TrackingPatchThird Party Advisory
supportportal.juniper.net / s/article/2021-07-Security-Bulletin-Junos-OS-Multiple-J-Web-vulnerabilities-resolved
Not Applicable