CVE Explorer
CVE-2026-53962
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, insufficient SVG sanitization in upload and user avatar handling could lead to cross-site scripting when a user visited specific URLs that are not normally part of community browsing. 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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/problemTypes/0/descriptions/0
Source references
9 source assertions{"name":"https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/3ee8343cd7f00d59d8513bee0a12e02d50bfc358"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ff","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/810c2715799fd08b06fd6ffc664d9562fe9ea6ff"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/references/2
{"name":"https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dad","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/92a699d89b84685b6fdd63cd0d0e371793c69dad"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/references/3
{"name":"https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fe","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/b8ceb49f4ba52257be30eb3c2ce51a5bf03be5fe"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /containers/cna/references/8
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-jmcf-3367-78vv"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c4efc22bc11d313708263977c25b3a4da58f86d674360eeb68c9ed6fd03941e7 · sha256:7b3a6f261aa9fc2c… · /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.