Which products and versions are affected by CVE-2023-31689?

Affected: Wcms versions 0.3.2. The full list is in the CVE brief.

Is CVE-2023-31689 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2023-31689 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2023-31689?

Public exploit code is available.

Is there a fix for CVE-2023-31689?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2023-31689 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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WatchlistCritical

CVE-2023-31689Wcms Unrestricted File Upload

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.

Published May 22, 2023 · Updated Aug 12, 2026

Key Facts

Patch immediately

CVE-2023-31689 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Wcms.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 20% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

20%

Higher than 97.4% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

39/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://www.cve.org/CVERecord?id=CVE-2023-31689
advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-31689

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.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
WcmsWcms	0.3.2	n/a

Timeline

Publicly disclosed
May 22, 2023
Last updated
Aug 12, 2026

Weakness Type

CWE-434 Unrestricted Upload of File with Dangerous Type

References

FAQ

Common Questions.

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.
Affected: Wcms versions 0.3.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2023-31689 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.