CVE-2025-15438
Published: 02 January 2026
Summary
CVE-2025-15438 is a medium-severity Improper Input Validation (CWE-20) vulnerability in Pluxml Pluxml. Its CVSS base score is 4.7 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote deserialization of untrusted data (CWE-502) in a public-facing web app admin module directly enables RCE exploitation.
NVD Description
A vulnerability was determined in PluXml up to 5.8.22. Affected is the function FileCookieJar::__destruct of the file core/admin/medias.php of the component Media Management Module. Executing a manipulation of the argument File can lead to deserialization. The attack can be launched…
more
remotely. The exploit has been publicly disclosed and may be utilized. The vendor was informed early about this issue and announced that "[w]e fix this issue in the next version 5.8.23". A patch for it is ready.
Deeper analysisAI
CVE-2025-15438 is a deserialization vulnerability affecting PluXml versions up to 5.8.22. The issue resides in the FileCookieJar::__destruct function within the core/admin/medias.php file of the Media Management Module. Manipulation of the File argument triggers unsafe deserialization, as classified under CWE-20 (Improper Input Validation) and CWE-502 (Deserialization of Untrusted Data).
The vulnerability is exploitable remotely over the network (AV:N) with low attack complexity (AC:L), but requires high privileges (PR:H) and no user interaction (UI:N). Exploitation results in low impacts to confidentiality, integrity, and availability (C:I:A:L/L/L) within unchanged scope (S:U), yielding a CVSS v3.1 base score of 4.7.
The vendor was informed early and announced a fix in the upcoming version 5.8.23, with a patch ready. Advisories from VulDB indicate the exploit has been publicly disclosed and may be utilized, with details available at references including https://note-hxlab.wetolink.com/share/9SJUnaDcJuqz, https://vuldb.com/?ctiid.339383, https://vuldb.com/?id.339383, and https://vuldb.com/?submit.713989.
An exploit is publicly available, increasing the risk for unpatched PluXml 5.8.22 instances despite the moderate CVSS score.
Details
- CWE(s)