CVE-2026-32257

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (29th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Prior to 1.2.13, custom CSS supplied through the Brand Settings Styles field by a backend user with the backend.manage_branding permission is compiled by the LESS parser and rendered without sanitization on every backend page, allowing stored cross-site scripting against backend users. This issue is fixed in version 1.2.13.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 12, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 26, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Stored XSS through Brand Settings custom styles · Advisory · wintercms/winter · GitHub

Affected: v1.2.13.

https://github.com/wintercms/winter/security/advisories/GHSA-v7cf-8gh9-gxmj
github_commit Patch Available

commit d28f0b9474af (wintercms/winter)

Patch available: wintercms/winter v1.2.13 (contains commit d28f0b9474af)

https://github.com/wintercms/winter/commit/d28f0b9474af79cfaa80eeb9d691f7a7c4469720

Vendor Advisories for CVE-2026-32257(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
winter/wn-backend-modulev1.0.473 ... v1.2.9 (26 versions)
  • every version up to 1.2.13: fixed in 1.2.13
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-03 20:04 UTCEG score recompute
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-02 22:01 UTCEG score recompute
  5. 2026-10-02 08:22 UTCEG score recompute
  6. 2026-10-01 19:49 UTCEPSS rescore
  7. 2026-09-30 21:57 UTCEG score recompute
  8. 2026-09-30 15:03 UTCEPSS rescore
  9. 2026-09-29 04:51 UTCEG score recompute
  10. 2026-09-28 14:43 UTCEG score recompute
  11. 2026-09-28 13:51 UTCEPSS rescore
  12. 2026-09-28 01:33 UTCEG score recompute
  13. 2026-09-27 13:48 UTCEPSS rescore
  14. 2026-09-27 09:56 UTCEG score recompute
  15. 2026-09-26 15:58 UTCEPSS rescore
  16. 2026-09-26 00:26 UTCEPSS rescore
  17. 2026-09-25 03:42 UTCEG score recompute
  18. 2026-09-23 23:33 UTCEG score recompute
  19. 2026-09-22 21:07 UTCEG score recompute
  20. 2026-09-22 03:22 UTCEG score recompute
  21. 2026-09-21 00:17 UTCEG score recompute
  22. 2026-09-20 20:15 UTCEPSS rescore
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  24. 2026-09-19 19:45 UTCEG score recompute
  25. 2026-09-19 06:08 UTCEG score recompute
Show 45 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-18 02:54 UTCEG score recompute
  4. 2026-09-17 19:30 UTCEPSS rescore
  5. 2026-09-17 00:22 UTCEG score recompute
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 13:13 UTCEG score recompute
  9. 2026-09-13 19:25 UTCEG score recompute
  10. 2026-09-13 16:47 UTCEPSS rescore
  11. 2026-09-12 17:10 UTCEG score recompute
  12. 2026-09-12 15:01 UTCEPSS rescore
  13. 2026-09-12 04:02 UTCEG score recompute
  14. 2026-09-11 14:52 UTCEPSS rescore
  15. 2026-09-11 14:52 UTCEG score recompute
  16. 2026-09-10 12:33 UTCEG score recompute
  17. 2026-09-10 09:34 UTCEPSS rescore
  18. 2026-09-09 05:18 UTCEG score recompute
  19. 2026-09-08 22:00 UTCEPSS rescore
  20. 2026-09-07 19:02 UTCEG score recompute
  21. 2026-09-07 16:01 UTCEPSS rescore
  22. 2026-09-06 16:40 UTCEG score recompute
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-06 03:31 UTCEG score recompute
  26. 2026-09-05 00:44 UTCEG score recompute
  27. 2026-09-04 07:57 UTCEG score recompute
  28. 2026-09-04 05:06 UTCEPSS rescore
  29. 2026-09-02 23:39 UTCEG score recompute
  30. 2026-09-02 14:11 UTCEPSS rescore
  31. 2026-09-02 00:52 UTCEG score recompute
  32. 2026-09-01 13:53 UTCEPSS rescore
  33. 2026-09-01 11:45 UTCEG score recompute
  34. 2026-09-01 04:39 UTCEPSS rescore
  35. 2026-09-01 04:39 UTCEPSS rescore
  36. 2026-08-31 00:01 UTCEG score recompute
  37. 2026-08-30 19:17 UTCEPSS rescore
  38. 2026-08-30 10:53 UTCEG score recompute
  39. 2026-08-30 01:22 UTCEPSS rescore
  40. 2026-08-29 08:38 UTCEG score recompute
  41. 2026-08-28 21:41 UTCEPSS rescore
  42. 2026-08-27 17:24 UTCEG score recompute
  43. 2026-08-27 14:25 UTCEPSS rescore
  44. 2026-08-26 17:19 UTCEG score recompute
  45. 2026-08-12 14:46 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-32257?
CVE-2026-32257 is a high vulnerability published on August 12, 2026. Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Prior to 1.2.13, custom CSS supplied through the Brand Settings Styles field by a backend user with the backend.manage_branding permission is compiled by the LESS parser and rendered without…
When was CVE-2026-32257 disclosed?
CVE-2026-32257 was first published on August 12, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-32257 actively exploited?
CVE-2026-32257 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-32257?
CVE-2026-32257 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-32257?
A fix for CVE-2026-32257 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-32257 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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