Security readout for executives and security teams
Plain-English summary
CVE-2021-40604 is an SSRF flaw in IPS Community Suite before 4.6.2. A vulnerable community site could be abused to make server-side URL requests, and the source text also mentions possible PHAR deserialization. Authentication is usually required, but some cases may be unauthenticated.
Executive priority
Treat this as high priority for internet-facing IPS Community sites, especially where sensitive internal services are reachable from the application server. Patch status matters more than exploit hype here because source evidence is limited.
Technical view
The CVE describes remote authenticated SSRF in IPS Community Suite before 4.6.2, allowing arbitrary URL requests. It also notes possible deserialization through the phar protocol during dynamic class-name generation. Public source detail is limited, with no CVSS, CWE, affected CPEs, or confirmed exploitation listed.
Likely exposure
Organizations running IPS Community Suite versions earlier than 4.6.2 are the stated exposure group. The bundle does not provide CPEs, deployment specifics, or module-level affected paths.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation is described as remote and authenticated in general, with some cases possibly unauthenticated.
Researcher notes
Key gaps are CVSS, CWE, affected CPEs, exact vulnerable endpoints, and vendor mitigation detail beyond the before-4.6.2 version boundary. Avoid assuming active exploitation or specific impact beyond SSRF and possible PHAR deserialization.
Mitigation direction
- Upgrade IPS Community Suite to 4.6.2 or later.
- Review Invision Community 4.6.2 release notes and vendor guidance.
- Prioritize externally reachable community installations.
- Check vendor support channels for any backport or temporary mitigation.
- Monitor server logs for unusual outbound URL fetch behavior.
Validation and detection
- Inventory all IPS Community Suite installations and versions.
- Confirm no production instance runs earlier than 4.6.2.
- Review access logs for suspicious requests around URL-fetching features.
- Check whether unauthenticated users can reach vulnerable workflows.
- Verify upgrade completion in staging and production.
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.
Cloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-40604 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://invisioncommunity.com/release-notes/462-r99/CVE reference · x_refsource_MISC
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.