CVE-2026-3335

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-03-21. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

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

The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the /wp-content/plugins/canto/includes/lib/copy-media.php file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the fbc_flight_domain and fbc_app_api URL components being accepted as user-supplied POST parameters rather than read from admin-configured options. Since the attacker controls both the destination server and the fbc_app_token value, the entire fetch-and-upload chain is attacker-controlled — the server never contacts Canto's legitimate API, and the uploaded file originates entirely from the attacker's infrastructure. This makes it possible for unauthenticated attackers to upload arbitrary files (constrained to WordPress-allowed MIME types) to the WordPress uploads directory. Additional endpoints (detail.php, download.php, get.php, tree.php) are also directly accessible without authentication and make requests using a user-supplied app_api parameter combined with an admin-configured subdomain.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
35.5%
KEV
Not listed

Published

March 21, 2026

Last Modified

April 24, 2026

References (7)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 35× 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. 2026-07-21 15:24 UTCEPSS rescore
  2. 2026-07-20 17:08 UTCEPSS rescore
  3. 2026-07-19 14:31 UTCEPSS rescore
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  1. 2026-06-29 14:06 UTCEPSS rescore
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  5. 2026-06-25 13:49 UTCEPSS rescore
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  22. 2026-06-12 23:12 UTCEPSS rescore
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  24. 2026-06-11 23:39 UTCGHSA enrichment
  25. 2026-06-11 14:00 UTCEPSS rescore
  26. 2026-06-10 22:18 UTCEPSS rescore
  27. 2026-06-10 18:42 UTCGHSA enrichment
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  29. 2026-06-09 16:17 UTCGHSA enrichment
  30. 2026-06-08 14:17 UTCEPSS rescore
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  32. 2026-06-07 15:25 UTCEPSS rescore
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  35. 2026-06-07 13:44 UTCGHSA enrichment
  36. 2026-06-06 13:47 UTCEPSS rescore
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  38. 2026-06-05 22:47 UTCEPSS rescore
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  45. 2026-06-01 13:52 UTCEPSS rescore
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  48. 2026-05-31 22:30 UTCEPSS rescore
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  50. 2026-05-31 00:16 UTCEPSS rescore
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  64. 2026-05-20 22:38 UTCEPSS rescore
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  66. 2026-05-20 20:46 UTCEG score recompute
  67. 2026-05-20 20:46 UTCGHSA enrichment
  68. 2026-05-20 11:22 UTCEPSS rescore
  69. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-3335?
CVE-2026-3335 is a medium vulnerability published on March 21, 2026. The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the /wp-content/plugins/canto/includes/lib/copy-media.php file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the…
When was CVE-2026-3335 disclosed?
CVE-2026-3335 was first published in the National Vulnerability Database on March 21, 2026, with the most recent update on April 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3335 actively exploited?
CVE-2026-3335 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-3335?
CVE-2026-3335 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-3335?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3335, 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.

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