CVE-2018-15504

Exp

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.

Published: 2018-08-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-15504 is rated High Exploit Risk (72/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.98%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-15504

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-15504

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-12 0.84% 0.98% +0.14%
2 2026-05-10 0.47% 0.84% +0.37%
3 2026-03-13 — 0.47% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-15504

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-15504

Affected software / configurations for CVE-2018-15504

Vendor Product Version Raw CPE
embedthis appweb < 7.0.2 cpe:2.3:a:embedthis:appweb:*:*:*:*:*:*:*:*
embedthis goahead < 4.0.1 cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:-:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d10:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d15:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d20:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d25:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d30:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d35:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d40:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d45:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d50:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d55:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d60:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d65:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d66:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d67:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d70:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d71:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d72:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d73:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d76:*:*:*:*:*:*
juniper junos 12.1x46 cpe:2.3:o:juniper:junos:12.1x46:d77:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:-:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d10:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d15:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d20:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d25:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d30:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d35:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d40:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d45:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d50:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d51:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d55:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d60:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d65:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d66:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d70:*:*:*:*:*:*
juniper junos 12.3x48 cpe:2.3:o:juniper:junos:12.3x48:d75:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:-:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d10:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d100:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d110:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d120:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d130:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d131:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d140:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d15:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d150:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d160:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d170:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d20:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d25:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d30:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d35:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d40:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d45:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d50:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d55:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d60:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d65:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d70:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d75:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d80:*:*:*:*:*:*
juniper junos 15.1x49 cpe:2.3:o:juniper:junos:15.1x49:d90:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:-:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r1:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r10:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r10-s1:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r10-s2:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r11:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s1:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s10:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s11:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s12:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s3:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s4:*:*:*:*:*:*
juniper junos 12.3 cpe:2.3:o:juniper:junos:12.3:r12-s6:*:*:*:*:*:*

References for CVE-2018-15504

cvelogic Threat Intelligence