HOME VULNERABILITIESCVE-2020-15688

HIGH

CVE-2020-15688

CWE-294Published: July 23, 2020· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

The HTTP Digest Authentication in the GoAhead web server before 5.1.2 does not completely protect against replay attacks. This allows an unauthenticated remote attacker to bypass authentication via capture-replay if TLS is not used to protect the underlying communication channel.

Technical Analysis

CVE-2020-15688 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

embedthis1 product(s)

goahead

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://packetstormsecurity.com/files/159505/EmbedThis-GoAhead-Web-Server-5.1.1-Digest-Authentication-Capture-Replay-Nonce-Reuse.html

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttp://packetstormsecurity.com/files/159505/EmbedThis-GoAhead-Web-Server-5.1.1-Digest-Authentication-Capture-Replay-Nonce-Reuse.html

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

ADVISORYhttps://github.com/embedthis/goahead-gpl/issues/3

All References (10)

→

http://packetstormsecurity.com/files/159505/EmbedThis-GoAhead-Web-Server-5.1.1-Digest-Authentication-Capture-Replay-Nonce-Reuse.htmlExploit · Third Party Advisory · VDB Entry

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

http://packetstormsecurity.com/files/159505/EmbedThis-GoAhead-Web-Server-5.1.1-Digest-Authentication-Capture-Replay-Nonce-Reuse.htmlExploit · Third Party Advisory · VDB Entry

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

→

https://github.com/embedthis/goahead-gpl/issues/3Third Party Advisory

Quick Facts

CVE IDCVE-2020-15688

CVSS Score8.8 / 10

SeverityHIGH

WeaknessCWE-294

CISA KEVNo

Affected1 vendor(s)

PublishedJul 23, 2020

Related CVEs (CWE-294)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2020-15688 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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