CVE-2026-13340

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreHIGH confidence

Score 6.1 from GitHub Security Advisory published 2026-08-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: Elevated riskExposed: 0

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

The SVG Support WordPress plugin before 2.5.17 does not apply its SVG sanitisation to uploaded files using the .svgz extension, even though it registers and serves them as SVG, allowing a user permitted to upload SVGs (such as an Author once granted upload access) to store a script-bearing file that executes in the browser of anyone who later views it, including an administrator.

CVSS v3
6.1
EG Score
6.1(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity61% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 3, 2026

Advisory Details (1)

Auto-updated Aug 3, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

SVG Support < 2.5.17 – Author+ Stored XSS via .svgz Sanitization Bypass | CVE 2026-13340 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/819ae1bd-3552-4e2f-a95a-0069852d745f/

Vendor Advisories for CVE-2026-13340(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 54× 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. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:23 UTCGHSA enrichment
  3. 2026-08-19 19:00 UTCEG score recompute
  4. 2026-08-19 19:00 UTCGHSA enrichment
  5. 2026-08-19 17:03 UTCEPSS rescore
  6. 2026-08-18 15:49 UTCEG score recompute
  7. 2026-08-18 15:49 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 12:40 UTCEG score recompute
  10. 2026-08-17 12:40 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 11:16 UTCEG score recompute
  13. 2026-08-16 11:16 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 09:54 UTCEG score recompute
  16. 2026-08-15 09:54 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 08:31 UTCEG score recompute
  19. 2026-08-14 08:31 UTCGHSA enrichment
  20. 2026-08-13 22:00 UTCEPSS rescore
  21. 2026-08-13 07:09 UTCEG score recompute
  22. 2026-08-13 07:09 UTCGHSA enrichment
  23. 2026-08-12 13:50 UTCEPSS rescore
  24. 2026-08-12 05:41 UTCEG score recompute
  25. 2026-08-12 05:41 UTCGHSA enrichment
Show 29 more
  1. 2026-08-11 13:42 UTCEPSS rescore
  2. 2026-08-11 04:18 UTCEG score recompute
  3. 2026-08-11 04:18 UTCGHSA enrichment
  4. 2026-08-10 23:59 UTCEPSS rescore
  5. 2026-08-10 02:55 UTCEG score recompute
  6. 2026-08-10 02:55 UTCGHSA enrichment
  7. 2026-08-09 13:46 UTCEPSS rescore
  8. 2026-08-09 01:33 UTCEG score recompute
  9. 2026-08-09 01:33 UTCGHSA enrichment
  10. 2026-08-08 16:37 UTCEPSS rescore
  11. 2026-08-08 00:10 UTCEG score recompute
  12. 2026-08-08 00:10 UTCGHSA enrichment
  13. 2026-08-06 22:47 UTCEG score recompute
  14. 2026-08-06 22:47 UTCGHSA enrichment
  15. 2026-08-06 13:46 UTCEPSS rescore
  16. 2026-08-05 21:03 UTCEG score recompute
  17. 2026-08-05 21:03 UTCGHSA enrichment
  18. 2026-08-05 19:17 UTCEPSS rescore
  19. 2026-08-04 19:40 UTCEG score recompute
  20. 2026-08-04 19:40 UTCGHSA enrichment
  21. 2026-08-04 15:09 UTCEPSS rescore
  22. 2026-08-04 10:38 UTCEPSS rescore
  23. 2026-08-03 18:17 UTCGHSA enrichment
  24. 2026-08-03 17:55 UTCEG score recompute▲ 6.10
  25. 2026-08-03 17:55 UTCGHSA enrichment
  26. 2026-08-03 17:53 UTCMITRE cvelistV5CVSS v3 → 6.1 · severity → MEDIUM
  27. 2026-08-03 07:22 UTCNVD update
  28. 2026-08-03 06:35 UTCEG score recompute
  29. 2026-08-03 06:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13340?
CVE-2026-13340 is a medium vulnerability published on August 3, 2026. The SVG Support WordPress plugin before 2.5.17 does not apply its SVG sanitisation to uploaded files using the .svgz extension, even though it registers and serves them as SVG, allowing a user permitted to upload SVGs (such as an Author once granted upload access) to store a script-bearing file…
When was CVE-2026-13340 disclosed?
CVE-2026-13340 was first published in the National Vulnerability Database on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13340 actively exploited?
CVE-2026-13340 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 92.0% of all scored CVEs.
What is the CVSS score of CVE-2026-13340?
CVE-2026-13340 has a CVSS v3.1 base score of 6.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-13340?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13340, 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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