How severe is CVE-2021-30177?

CVE-2021-30177 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-30177 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30177?

CVE-2021-30177 affects Phpnuke Php-nuke. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30177?

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

When was CVE-2021-30177 published?

CVE-2021-30177 was published on 2021-04-07 and last updated on 2026-06-17.

CVE-2021-30177

CVE-2021-30177 is a critical-severity vulnerability in Phpnuke Php-nuke with a CVSS 3.x base score of 9.8. 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-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Phpnuke Php-nuke
Published: 2021-04-07
Last modified: 2026-06-17

Description

There is a SQL Injection vulnerability in PHP-Nuke 8.3.3 in the User Registration section, leading to remote code execution. This occurs because the U.S. state is not validated to be two letters, and the OrderBy field is not validated to be one of LASTNAME, CITY, or STATE.

Frequently asked questions

What is CVE-2021-30177?: There is a SQL Injection vulnerability in PHP-Nuke 8.3.3 in the User Registration section, leading to remote code execution. This occurs because the U.S. state is not validated to be two letters, and the OrderBy field is not validated to be one of LASTNAME, CITY, or STATE.
How severe is CVE-2021-30177?: CVE-2021-30177 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30177 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30177?: CVE-2021-30177 affects Phpnuke Php-nuke. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30177?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-30177 published?: CVE-2021-30177 was published on 2021-04-07 and last updated on 2026-06-17.

References

https://gist.github.com/stacksmasher007/41e946fc9a5a2f0b6950626cc9d43d47

Affected products (1)

cpe:2.3:a:phpnuke:php-nuke:8.3.3:*:*:*:*:*:*:*

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