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No exploitation reportedFix available

CVE-2020-15688

No exploitation reported by the sources we read.

  • Published2020-07-23
  • Fixed in5.1.2
  • WeaknessCWE-294

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2020-07-2313:15CVE publishedNVD

Versions per branch

NVD
Embedthis goahead
BranchAffectedFixed in
5.1< 5.1.25.1.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

Full record on NVD

Fix

  1. Update Embedthis goahead to 5.1.2
  2. Vendor fix CISA ICSA-23-129-02 · 1 productMSM is not intrinsically designed nor intended to be directly connected to the internet. Users should disconnect the device from any internet-facing network.
  3. Vendor fix CISA ICSA-23-129-02 · 1 productHitachi Energy suggests adopting user access management and antivirus protection software equipped with the latest signature rules on hosts with the Manufacturing Message Specification (MMS) Client application installed. Users can implement the operating system user access management functionality,…
  4. Vendor fix CISA ICSA-23-129-02 · 1 productAlso, Hitachi Energy recommends following the hardening guidelines published by “The Center for Internet Security (CIS)” to protect the host operating system of machines connecting with MSM. These guidelines help prevent the lateral movement of the attack vector into MSM via these connected devices…
  5. Vendor fix CISA ICSA-23-129-02 · 1 productCIS Microsoft Windows Desktop Benchmarks (cisecurity.org)
  6. Vendor fix CISA ICSA-23-129-02 · 1 productCIS Microsoft Windows Server Benchmarks (cisecurity.org)
  7. Vendor fix CISA ICSA-23-129-02 · 1 productAccording to Hitachi Energy, users should follow recommended security practices and firewall configurations to help protect a network from outside attacks, including:

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2020-07-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6r2c-458p-644h

Frequently asked questions

What is CVE-2020-15688?

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.

Is CVE-2020-15688 actively exploited?

Active exploitation of CVE-2020-15688 has not been confirmed. Its EPSS score was 4.0% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-15688?

CVE-2020-15688 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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