GHSA-6qmh-j78v-ffp7
Suggest an improvement- Source
- https://github.com/advisories/GHSA-6qmh-j78v-ffp7
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-6qmh-j78v-ffp7/GHSA-6qmh-j78v-ffp7.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-6qmh-j78v-ffp7
- Aliases
- Published
- 2026-04-14T20:02:31Z
- Modified
- 2026-05-05T16:02:41Z
- Severity
-
- 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
- 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
- Summary
- October CMS has Stored XSS in Backend Editor Markup Classes
- Details
-
A stored cross-site scripting (XSS) vulnerability was identified in the Backend Editor Settings. The Markup Classes fields (used for paragraph styles, inline styles, table styles, etc.) did not sanitize input to valid CSS class name characters. Malicious values were rendered unsanitized in Froala editor dropdown menus, allowing JavaScript execution when any user opened a RichEditor.
Impact
- Stored XSS via editor settings rendered in RichEditor dropdowns
- Could allow privilege escalation if a superuser opens any RichEditor (e.g., editing a blog post)
- Requires authenticated backend access with editor settings permissions
- Triggers on routine content editing operations
Patches
The vulnerability has been patched in v3.7.14 and v4.1.10. All users are encouraged to upgrade to the latest patched version.
Workarounds
If upgrading immediately is not possible:
- Restrict editor settings permissions to fully trusted administrators only
References
- Reported by Chris Alupului
- Database specific
{ "cwe_ids": [ "CWE-79" ], "github_reviewed": true, "github_reviewed_at": "2026-04-14T20:02:31Z", "nvd_published_at": "2026-04-14T18:16:45Z", "severity": "MODERATE" }- References
Affected packages
Packagist / october/system
Package
- Name
- october/system
- Purl
- pkg:composer/october/system
Packagist / october/system
Package
- Name
- october/system
- Purl
- pkg:composer/october/system
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed3.7.14
Affected versions
v1.*
v1.0.319
v1.0.320
v1.0.321
v1.0.322
v1.0.323
v1.0.324
v1.0.325
v1.0.326
v1.0.327
v1.0.328
v1.0.329
v1.0.330
v1.0.331
v1.0.332
v1.0.333
v1.0.334
v1.0.335
v1.0.336
v1.0.337
v1.0.338
v1.0.339
v1.0.340
v1.0.341
v1.0.342
v1.0.343
v1.0.344
v1.0.345
v1.0.346
v1.0.347
v1.0.348
v1.0.349
v1.0.350
v1.0.351
v1.0.352
v1.0.353
v1.0.354
v1.0.355
v1.0.356
v1.0.357
v1.0.358
v1.0.359
v1.0.360
v1.0.361
v1.0.362
v1.0.363
v1.0.364
v1.0.365
v1.0.366
v1.0.367
v1.0.368
v1.0.369
v1.0.370
v1.0.371
v1.0.372
v1.0.373
v1.0.374
v1.0.375
v1.0.376
v1.0.377
v1.0.378
v1.0.379
v1.0.380
v1.0.381
v1.0.382
v1.0.383
v1.0.384
v1.0.385
v1.0.386
v1.0.387
v1.0.388
v1.0.389
v1.0.390
v1.0.391
v1.0.392
v1.0.393
v1.0.394
v1.0.395
v1.0.396
v1.0.397
v1.0.398
v1.0.399
v1.0.400
v1.0.401
v1.0.402
v1.0.403
v1.0.404
v1.0.405
v1.0.406
v1.0.407
v1.0.408
v1.0.409
v1.0.410
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v1.0.414
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v1.0.417
v1.0.418
v1.0.419
v1.0.420
v1.0.421
v1.0.422
v1.0.423
v1.0.424
v1.0.425
v1.0.426
v1.0.427
v1.0.428
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v1.0.433
v1.0.434
v1.0.435
v1.0.436
v1.0.437
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v1.0.439
v1.0.440
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v1.0.464
v1.0.465
v1.0.466
v1.0.467
v1.0.468
v1.0.469
v1.0.470
v1.0.471
v1.0.472
v1.0.473
v1.0.474
v1.0.475
v1.0.476
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.1.4
v1.1.5
v1.1.6
v1.1.9
v1.1.10
v1.1.11
v1.1.12