Security readout for executives and security teams
Plain-English summary
playSMS versions before 1.4.5 can allow arbitrary PHP code to be stored in a configuration information field and later executed by the application. For organizations using playSMS, this could let an attacker who can reach that configuration path run code on the server.
Executive priority
Prioritize remediation if playSMS is deployed, especially on internet-facing systems. Arbitrary code execution can threaten server integrity, but evidence in the supplied sources is incomplete on exploitation, privilege requirements, and scoring.
Technical view
CVE-2021-40373 describes arbitrary code execution in playSMS before 1.4.5 involving PHP code placed in the core main configuration information page and executed when the related welcome page is rendered. The sources do not provide CVSS, CWE, normalized CPEs, or confirmed active exploitation.
Likely exposure
Exposure is limited to playSMS deployments running versions before 1.4.5. Internet-facing deployments or environments where untrusted users can access configuration functionality should be prioritized. The source bundle does not clarify required privileges.
Exploitation context
A public GitHub reference exists for this CVE, but the bundle does not cite active exploitation, and CISA KEV is false. Treat it as a public code-execution issue, not as confirmed in-the-wild exploitation.
Researcher notes
The CVE record identifies playSMS before 1.4.5 and describes execution through application-rendered configuration content. A public GitHub reference is listed, but the prompt bundle lacks CVSS, CWE, detailed affected CPEs, and authoritative exploit-in-the-wild evidence.
Mitigation direction
- Upgrade playSMS to version 1.4.5 or later.
- Review the playSMS 1.4.5 vendor release guidance.
- Restrict access to playSMS administrative and configuration interfaces.
- Remove unexpected PHP or script content from affected configuration fields.
- Monitor vendor channels for any later remediation guidance.
Validation and detection
- Inventory all playSMS instances and record exact versions.
- Confirm no deployed instance is older than 1.4.5.
- Review configuration information fields for unexpected executable content.
- Check application and web logs for suspicious configuration changes.
- Verify administrative access is limited to trusted users.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40373 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/maikroservice/CVE-2021-40373CVE reference · x_refsource_MISC
- https://playsms.org/2021/09/04/playsms-1-4-5-released/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.