Security readout for executives and security teams
Plain-English summary
OpenBMCS 2.4 has an unauthenticated server-side request forgery issue. An outside attacker could make the OpenBMCS server contact other systems, including internal network targets, through the application. This can support internal reconnaissance and may affect session security. No cited source confirms active exploitation, but a public exploit listing exists.
Executive priority
Treat as a near-term remediation item for exposed OpenBMCS deployments. It is not marked as known exploited, but unauthenticated access and public exploit availability make internet-facing instances a meaningful business risk.
Technical view
CVE-2021-47703 is CWE-918 in OpenBMCS 2.4, affecting /php/query.php. The issue allows an unauthenticated attacker to supply an arbitrary destination through the ip parameter, causing server-side HTTP requests. The CVSS v4.0 score is 6.9. Reported impacts include firewall bypass, internal service enumeration, and current-session hijacking risk.
Likely exposure
Exposure is most likely where OpenBMCS 2.4 is reachable by untrusted users or the internet. Risk increases if the server can reach sensitive internal services, management interfaces, or session-related resources from its network position.
Exploitation context
The CVE record and advisories describe unauthenticated network exploitation, and ExploitDB is cited as an exploit reference. CISA KEV status is false in the provided bundle, and no provided source states active exploitation in the wild.
Researcher notes
Evidence identifies OpenBMCS 2.4 only; default status is listed as unaffected for other versions. The source bundle does not name a patch, fixed version, or vendor workaround. Avoid assuming broader product impact without vendor confirmation.
Mitigation direction
- Check OpenBMCS vendor guidance for fixed versions or official remediation.
- Restrict external access to OpenBMCS until remediation is confirmed.
- Limit server egress to only required destinations.
- Segment OpenBMCS from sensitive internal services.
- Monitor for unusual outbound requests initiated by the OpenBMCS host.
Validation and detection
- Inventory systems running OpenBMCS and confirm whether version 2.4 is present.
- Verify whether /php/query.php is reachable by untrusted users.
- Review application logs for suspicious ip parameter usage.
- Review network logs for unexpected outbound HTTP requests from OpenBMCS.
- Confirm vendor remediation status before closing the finding.
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.
CWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCloud 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-2021-47703 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
- Medium
- CVSS
- 6.9 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
6.9MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-50670CVE reference · exploit
- Official Product HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2022-5694)CVE reference · third-party-advisory
- VulnCheck Advisory: OpenBMCS Server Side Request Forgery (SSRF) via /php/query.phpCVE reference · third-party-advisory
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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.