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CVE-2026-67350

Serendipity before 2.6.1 contains an open redirect vulnerability in exit.php that allows unauthenticated attackers to redirect users to arbitrary external sites by supplying a malicious Base64-encoded url parameter when the Track Exits plugin is configured with commentredirection set to s9y. Attackers can craft trusted-looking URLs leveraging the legitimate blog domain to conduct phishing, deliver malware, or bypass URL reputation filters.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2a11c344a0e7a38a3a6712dfde234e2962eba63ec985ad31c170ac84371ad52e
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":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:github/s9y/Serendipity","product":"Serendipity","repo":"https://github.com/s9y/Serendipity","vendor":"s9y","versions":[{"lessThan":"2.6.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.6.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-601","description":"URL Redirection to Untrusted Site ('Open Redirect')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"GitHub Security Advisory (GHSA-77rw-27c5-4hxm)","tags":["vendor-advisory"],"url":"https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/s9y/Serendipity/security/advisories/GHSA-77rw-27c5-4hxm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/adp/0/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/serendipity-open-redirect-via-exit-php"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8d99c3a7888d4187ac655ab94b955c1fd4511018175a1fec3a87be55e0c1bc4 · sha256:b2edac8537f513e0… · /containers/cna/references/1

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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