Security readout for executives and security teams
Plain-English summary
phpIPAM 1.4.3 has a reflected cross-site scripting issue in IP calculator result pages. An attacker may be able to make a user open crafted content that causes script execution in their browser. The sources do not provide a CVSS score, fixed version, or evidence of active exploitation.
Executive priority
Handle as a moderate-priority web application exposure. The main concern is browser-side compromise of users accessing phpIPAM. Escalate priority if phpIPAM is internet-facing, used by privileged administrators, or lacks access restrictions.
Technical view
The CVE describes reflected XSS in app/dashboard/widgets/ipcalc-result.php and app/tools/ip-calculator/result.php within phpIPAM 1.4.3. Public references include the upstream issue and a PoC write-up reference. KEV is false, and the supplied data does not identify affected CPEs, CWEs, or a vendor patch.
Likely exposure
Exposure is most likely where phpIPAM 1.4.3 is deployed and users can access the named IP calculator result pages. Internet-facing administrative portals would increase business risk, but the source bundle does not confirm authentication requirements or default exposure.
Exploitation context
The bundle identifies a public PoC reference, but does not cite confirmed exploitation in the wild. CISA KEV status is false. Treat this as a known web application XSS risk requiring validation, not as confirmed active exploitation.
Researcher notes
Evidence is thin: the CVE record names phpIPAM 1.4.3 and two affected paths, but provides no CVSS, CWE, CPE, fixed release, or exploitation confirmation. Avoid assuming broader version impact without vendor confirmation.
Mitigation direction
- Inventory phpIPAM deployments and confirm whether version 1.4.3 is present.
- Check phpIPAM vendor issue and release guidance for fixed versions or recommended remediation.
- Reduce phpIPAM access to trusted users and networks while remediation is assessed.
- Prioritize remediation for internet-accessible or broadly reachable administrative instances.
Validation and detection
- Confirm whether the named IP calculator result pages exist on deployed phpIPAM instances.
- Review web access logs for unusual requests to the named result page paths.
- Verify deployed phpIPAM version against asset inventory and package records.
- Check whether compensating controls restrict untrusted access to phpIPAM.
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.
CVE-2021-35438 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/phpipam/phpipam/issues/3351CVE reference
- https://github.com/MarkLee131/awesome-web-pocs/blob/main/CVE-2021-35438.mdCVE reference
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.