How severe is CVE-2023-31689?

CVE-2023-31689 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-2023-31689 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31689?

CVE-2023-31689 affects Wcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31689?

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-2023-31689 published?

CVE-2023-31689 was published on 2023-05-22 and last updated on 2026-06-17.

CVE-2023-31689

CVE-2023-31689 is a critical-severity vulnerability in Wcms with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Wcms
Published: 2023-05-22
Last modified: 2026-06-17

Description

In Wcms 0.3.2, an attacker can send a crafted request from a vulnerable web application backend server /wcms/wex/html.php via the finish parameter and the textAreaCode parameter. It can write arbitrary strings into custom file names and upload any files, and write malicious code to execute scripts to trigger command execution.

Frequently asked questions

What is CVE-2023-31689?: In Wcms 0.3.2, an attacker can send a crafted request from a vulnerable web application backend server /wcms/wex/html.php via the finish parameter and the textAreaCode parameter. It can write arbitrary strings into custom file names and upload any files, and write malicious code to execute scripts to trigger command execution.
How severe is CVE-2023-31689?: CVE-2023-31689 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-2023-31689 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31689?: CVE-2023-31689 affects Wcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31689?: 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-2023-31689 published?: CVE-2023-31689 was published on 2023-05-22 and last updated on 2026-06-17.

References

https://github.com/vedees/wcms/issues/15

Affected products (1)

cpe:2.3:a:wcms:wcms:0.3.2:*:*:*:*:*:*:*

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