How severe is CVE-2021-23592?

CVE-2021-23592 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2021-23592 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23592?

CVE-2021-23592 affects Thinkphp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23592?

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-2021-23592 published?

CVE-2021-23592 was published on 2022-05-06 and last updated on 2026-06-17.

CVE-2021-23592

CVE-2021-23592 is a high-severity vulnerability in Thinkphp with a CVSS 3.x base score of 7.7. 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.7)
CVSS v2: 7.5
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Thinkphp
Published: 2022-05-06
Last modified: 2026-06-17

Description

The package topthink/framework before 6.0.12 are vulnerable to Deserialization of Untrusted Data due to insecure unserialize method in the Driver class.

Frequently asked questions

What is CVE-2021-23592?: The package topthink/framework before 6.0.12 are vulnerable to Deserialization of Untrusted Data due to insecure unserialize method in the Driver class.
How severe is CVE-2021-23592?: CVE-2021-23592 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2021-23592 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23592?: CVE-2021-23592 affects Thinkphp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23592?: 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-2021-23592 published?: CVE-2021-23592 was published on 2022-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:thinkphp:thinkphp:*:*:*:*:*:*:*:*

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