CVE Explorer
CVE-2026-53963
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a malicious second factor name on an attacker-controlled account was not escaped in the delete confirmation dialog, allowing stored cross-site scripting when an administrator impersonated that account. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"discourse","vendor":"discourse","versions":[{"status":"affected","version":">= 2026.1.0-latest, < 2026.1.5"},{"status":"affected","version":">= 2026.4.0-latest, < 2026.4.2"},{"status":"affected","version":">= 2026.5.0-latest, < 2026.5.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /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:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/problemTypes/0/descriptions/0
Source references
9 source assertions{"name":"https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/40de62cddadc65c328a1028ab999f3fa94adbfed"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/529e17d4d570a48972e7cf64720e5dd1fdf23ca8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/2
{"name":"https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/d92973e51a46cf6dd20c71e6068e6769b67eea5b"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/3
{"name":"https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/daea5214d833eacbdd3b1a78d99eb14e9cabd915"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/4
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/5
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/6
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/7
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /containers/cna/references/8
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-wg5x-7f23-m3r5"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:afce013b00685a24383693226caae613039a1f838192b7c358ff013e3e5fc191 · sha256:76f5fa017aea15c8… · /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.