How severe is CVE-2020-15688?

CVE-2020-15688 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15688 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15688?

CVE-2020-15688 affects Embedthis Goahead. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15688?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-15688 published?

CVE-2020-15688 was published on 2020-07-23 and last updated on 2026-06-17.

CVE-2020-15688

CVE-2020-15688 is a high-severity vulnerability in Embedthis Goahead with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-294.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-294
Affected product: Embedthis Goahead
Published: 2020-07-23
Last modified: 2026-06-17

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.

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.
How severe is CVE-2020-15688?: CVE-2020-15688 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-15688 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15688?: CVE-2020-15688 affects Embedthis Goahead. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15688?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-15688 published?: CVE-2020-15688 was published on 2020-07-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:embedthis:goahead:*:*:*:*:*:*:*:*

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