How severe is CVE-2020-23356?

CVE-2020-23356 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-23356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23356?

CVE-2020-23356 affects Nibbleblog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23356?

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-2020-23356 published?

CVE-2020-23356 was published on 2021-01-27 and last updated on 2026-06-17.

CVE-2020-23356

CVE-2020-23356 is a high-severity vulnerability in Nibbleblog with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nibbleblog
Published: 2021-01-27
Last modified: 2026-06-17

Description

dmin/kernel/api/login.class.phpin in nibbleblog v3.7.1c allows type juggling for login bypass because == is used instead of === for password hashes, which mishandles hashes that begin with 0e followed by exclusively numerical characters.

Frequently asked questions

What is CVE-2020-23356?: dmin/kernel/api/login.class.phpin in nibbleblog v3.7.1c allows type juggling for login bypass because == is used instead of === for password hashes, which mishandles hashes that begin with 0e followed by exclusively numerical characters.
How severe is CVE-2020-23356?: CVE-2020-23356 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-23356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23356?: CVE-2020-23356 affects Nibbleblog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23356?: 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-2020-23356 published?: CVE-2020-23356 was published on 2021-01-27 and last updated on 2026-06-17.

References

https://github.com/dignajar/nibbleblog/pull/148

Affected products (1)

cpe:2.3:a:nibbleblog:nibbleblog:3.7.1c:*:*:*:*:*:*:*

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