How severe is CVE-2020-23653?

CVE-2020-23653 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-2020-23653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23653?

CVE-2020-23653 affects Thinkadmin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23653?

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-2020-23653 published?

CVE-2020-23653 was published on 2021-01-13 and last updated on 2026-06-17.

CVE-2020-23653

CVE-2020-23653 is a critical-severity vulnerability in Thinkadmin 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Thinkadmin
Published: 2021-01-13
Last modified: 2026-06-17

Description

An insecure unserialize vulnerability was discovered in ThinkAdmin versions 4.x through 6.x in app/admin/controller/api/Update.php and app/wechat/controller/api/Push.php, which may lead to arbitrary remote code execution.

Frequently asked questions

What is CVE-2020-23653?: An insecure unserialize vulnerability was discovered in ThinkAdmin versions 4.x through 6.x in app/admin/controller/api/Update.php and app/wechat/controller/api/Push.php, which may lead to arbitrary remote code execution.
How severe is CVE-2020-23653?: CVE-2020-23653 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-2020-23653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23653?: CVE-2020-23653 affects Thinkadmin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23653?: 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-2020-23653 published?: CVE-2020-23653 was published on 2021-01-13 and last updated on 2026-06-17.

References

https://github.com/zoujingli/ThinkAdmin/issues/238

Affected products (1)

cpe:2.3:a:thinkadmin:thinkadmin:*:*:*:*:*:*:*:*

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