{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-126498", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-10T21:45:21.807Z", "datePublished": "2026-11-11T00:58:50.974Z", "dateUpdated": "2026-11-11T00:58:50.974Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-11T00:58:50.974Z"}, "datePublic": "2026-11-09T22:46:22.000Z", "title": "WriteFreely before 0.17.3 Stored XSS via Unsanitized Post Slug", "descriptions": [{"lang": "en", "value": "WriteFreely before 0.17.3 contains a stored cross-site scripting vulnerability that allows authenticated authors to inject HTML by supplying a malicious post slug via the CreatePost API. The raw slug is concatenated into an anchor by augmentReadingDestination() for paid-shortcode posts, executing script for RSS/Atom feed readers, newsletter recipients and ActivityPub viewers."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "affected": [{"vendor": "Musing Studio", "product": "WriteFreely", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "0.17.3", "status": "affected", "versionType": "semver"}], "packageURL": "pkg:golang/github.com/writefreely/writefreely", "repo": "https://github.com/writefreely/writefreely"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 5.1, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/writefreely/writefreely/security/advisories/GHSA-cwxm-8ch5-j2vh", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-cwxm-8ch5-j2vh)"}, {"url": "https://github.com/writefreely/writefreely/commit/d7231d81a914f1314a218d5e8fde6e0341391ccd", "tags": ["patch"]}, {"url": "https://github.com/writefreely/writefreely/releases/tag/v0.17.3", "tags": ["release-notes"], "name": "WriteFreely v0.17.3 Release Notes"}, {"url": "https://github.com/writefreely/writefreely/blob/v0.17.2/postrender.go#L117-L121", "tags": ["technical-description"]}, {"url": "https://github.com/writefreely/writefreely/blob/v0.17.2/database.go#L702-L705", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: WriteFreely before 0.17.3 Stored XSS via Unsanitized Post Slug", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/writefreely-before-0.17.3-stored-xss-via-unsanitized-post-slug"}], "credits": [{"lang": "en", "value": "George Chen", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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