CVE Explorer
CVE-2026-42556
Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/<postId>?share=true to another user. The preview page renders that stored HTML with dangerouslySetInnerHTML on the main application origin. This issue has been patched in version 2.21.7.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"postiz-app","vendor":"gitroomhq","versions":[{"status":"affected","version":">= 2.21.6, < 2.21.7"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:258ada3d917f0873ad859eea325f9ea0e575f95217010fb94edbb07c107e5484 · sha256:234ddaf74caddfa6… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.9,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:258ada3d917f0873ad859eea325f9ea0e575f95217010fb94edbb07c107e5484 · sha256:234ddaf74caddfa6… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:258ada3d917f0873ad859eea325f9ea0e575f95217010fb94edbb07c107e5484 · sha256:234ddaf74caddfa6… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"name":"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.7","tags":["x_refsource_MISC"],"url":"https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.7"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:258ada3d917f0873ad859eea325f9ea0e575f95217010fb94edbb07c107e5484 · sha256:234ddaf74caddfa6… · /containers/cna/references/1
{"name":"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-hhxq-3wg7-4rj8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-hhxq-3wg7-4rj8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:258ada3d917f0873ad859eea325f9ea0e575f95217010fb94edbb07c107e5484 · sha256:234ddaf74caddfa6… · /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.