Fediverse Embeds < 1.5.8 - Unauthenticated SSRF via Site Info Endpoint
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
The Fediverse Embeds WordPress plugin before 1.5.8 does not validate the destination of the server-side request performed by an unauthenticated site-info endpoint before fetching it, allowing anonymous users (the gating nonce is exposed on public pages carrying an embed) to make the site request internal and private-network URLs and read back the parsed page metadata. This is a Server-Side Request Forgery.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Unknown | Fediverse Embeds | before 1.5.8 | 1.5.8 | Patch available | CNA |
- Fediverse Embeds VendorUnknown Affected before 1.5.8 Fixed in 1.5.8 Patch available CNA
Remediation
- Fix · CNA Fediverse Embeds (Unknown) Fixed in 1.5.8
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Fediverse Embeds 1.5.8
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2026-10741 Fediverse Embeds < 1.5.8 - Unauthenticated SSRF via Media ProxyPriority MEDIUM 63
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12517
- 2026-10-03 Alias added: GHSA-9x4j-8g3j-786h
References
Sources
- CVE-2026-12517 · CVE Program
- CVE-2026-12517 · NVD
- FIRST EPSS
- GHSA-9x4j-8g3j-786h · GitHub Advisory Database · CC BY 4.0
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