CVE Explorer

CVE-2026-13400

Simply Schedule Appointments is vulnerable to unauthenticated Stored Cross-Site Scripting in all versions up to and including 1.6.12.2. The root cause is a sanitization-ordering defect: the rendered notification content is decoded back into live HTML after it has already passed through the Simply Schedule Appointments WordPress plugin before 1.6.12.4's wp_kses_post() filter, so a double-encoded payload survives intake and is reintroduced as an executable element at render time.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2a36958e3e307b77b5fa1b95512c829f1f31f88871f4a4845aeedd907da45a67

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"CWE-79 Cross-Site Scripting (XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Simply Schedule Appointments","vendor":"Unknown","versions":[{"lessThan":"1.6.12.4","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"description":"CWE-79 Cross-Site Scripting (XSS)","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["exploit","vdb-entry","technical-description"],"url":"https://wpscan.com/vulnerability/501b2929-3216-4587-8124-088fd51becf1/"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:c511cf4805c900ca34c53965d5ccb886aa20306d6db696e4604954dcf2d4e1d2 · sha256:8009a4ffbfd3cbe0… · /containers/cna/references/0

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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