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CVE-2026-61520

Simple Machines Forum 2.1 prior to commit 4bf35cf and 3.0 prior to commit b4d23df contains a server-side request forgery vulnerability in the image proxy that allows authenticated attackers to trigger internal HTTP requests by embedding attacker-controlled URLs in BBCode image tags, which the proxy fetches without validating resolved destination IPs against private address ranges, loopback, or link-local addresses. Attackers can leverage SMF's automatic HMAC signature generation for any embedded
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:face53cfe6304d4439dbd93f56e5d2a99f406d3ef72549a2edaf1985c1355aca
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/SimpleMachines/SMF","product":"SMF","repo":"https://github.com/SimpleMachines/SMF","vendor":"SimpleMachines","versions":[{"lessThan":"2.1.7","status":"affected","version":"2.1.0","versionType":"semver"},{"status":"unaffected","version":"4bf35cf9e45573a5f55a6f52995086c1da89c096","versionType":"git"},{"status":"unaffected","version":"3.0.0","versionType":"semver"},{"status":"affected","version":"b4d23dfd74a511587c605f9d294cefc3a75b4b26","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"Patch Commit (v2.1)","tags":["patch"],"url":"https://github.com/SimpleMachines/SMF/commit/4bf35cf9e45573a5f55a6f52995086c1da89c096"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/references/0
{"name":"Patch Commit (v3.0)","tags":["patch"],"url":"https://github.com/SimpleMachines/SMF/commit/b4d23dfd74a511587c605f9d294cefc3a75b4b26"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/simple-machines-forum-ssrf-via-image-proxy"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1ad012bf6f46851e370496eb0d2c59240294972a3af21617cc8cfdd1a7e077c1 · sha256:3b69a6a2c81bc7fb… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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