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: 0.2%, top 88% of all CVEs by exploit prediction. 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%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

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 rangeFixed inDependents
winter/wn-backend-modulev1.0.473 ... v1.2.9 (26 versions)1.2.13—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 45× 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. 2026-09-19 06:08 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 02:54 UTCEG score recompute
  5. 2026-09-17 19:30 UTCEPSS rescore
  6. 2026-09-17 00:22 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-15 13:13 UTCEG score recompute
  10. 2026-09-13 19:25 UTCEG score recompute
  11. 2026-09-13 16:47 UTCEPSS rescore
  12. 2026-09-12 17:10 UTCEG score recompute
  13. 2026-09-12 15:01 UTCEPSS rescore
  14. 2026-09-12 04:02 UTCEG score recompute
  15. 2026-09-11 14:52 UTCEPSS rescore
  16. 2026-09-11 14:52 UTCEG score recompute
  17. 2026-09-10 12:33 UTCEG score recompute
  18. 2026-09-10 09:34 UTCEPSS rescore
  19. 2026-09-09 05:18 UTCEG score recompute
  20. 2026-09-08 22:00 UTCEPSS rescore
  21. 2026-09-07 19:02 UTCEG score recompute
  22. 2026-09-07 16:01 UTCEPSS rescore
  23. 2026-09-06 16:40 UTCEG score recompute
  24. 2026-09-06 13:47 UTCEPSS rescore
  25. 2026-09-06 13:47 UTCEPSS rescore
Show 21 more
  1. 2026-09-06 03:31 UTCEG score recompute
  2. 2026-09-05 00:44 UTCEG score recompute
  3. 2026-09-04 07:57 UTCEG score recompute
  4. 2026-09-04 05:06 UTCEPSS rescore
  5. 2026-09-02 23:39 UTCEG score recompute
  6. 2026-09-02 14:11 UTCEPSS rescore
  7. 2026-09-02 00:52 UTCEG score recompute
  8. 2026-09-01 13:53 UTCEPSS rescore
  9. 2026-09-01 11:45 UTCEG score recompute
  10. 2026-09-01 04:39 UTCEPSS rescore
  11. 2026-09-01 04:39 UTCEPSS rescore
  12. 2026-08-31 00:01 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 10:53 UTCEG score recompute
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-29 08:38 UTCEG score recompute
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-27 17:24 UTCEG score recompute
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 17:19 UTCEG score recompute
  21. 2026-08-12 14:46 UTCEG score recompute

Related CVEs(same CWE)

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 87.7% of all scored CVEs.
What is the CVSS score of CVE-2026-32257?
CVE-2026-32257 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-32257?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32257, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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