CVE-2020-15688
This allows an unauthenticated remote attacker to bypass authentication via capture-replay if TLS is not used to protect the underlying communication channel.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.04%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 4.04% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-294
- Affected
- embedthis/goahead
- Source
- cve@mitre.org
EPSS 4.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.