CVE-2026-67617

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-08-04. the CNA's CVSS baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: Elevated riskExposed: 0

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

Microweber CMS through 2.0.20 contains a stored cross-site scripting vulnerability in the content tagging system that allows admin-authenticated attackers to inject arbitrary JavaScript by submitting malicious payloads via the tag_names parameter of the GET /api/save_content_admin endpoint, bypassing three independent sanitization controls including XSS middleware that ignores GET requests, a strip_unsafe() function that only matches double-quoted onerror attributes, and a titlecase normalizer that passes HTML decimal entity-encoded payloads through unchanged. Attackers can store malicious scripts that execute without user interaction for every visitor to the public blog page and within the admin post editor, enabling session riding through same-origin fetch requests using the CSRF token embedded in the page.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 3, 2026
No patch confirmed yet.
generic

Microweber CMS 2.0.20 Stored XSS via tag_names Parameter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/microweber-cms-stored-xss-via-tag-names-parameter
generic

GitHub - theopaid/Stored-XSS-via-Content-Tag-Names-Microweber-: Security Advisory: Stored XSS via Content Tag Names - Microweber CMS 2.0.20 · GitHub

https://github.com/theopaid/Stored-XSS-via-Content-Tag-Names-Microweber-

Vendor Advisories for CVE-2026-67617(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 20× in last 7d / 52× 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 23:53 UTCEG score recompute
  2. 2026-08-20 23:53 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-19 22:48 UTCEG score recompute
  5. 2026-08-19 22:48 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-18 21:43 UTCEG score recompute
  8. 2026-08-18 21:43 UTCGHSA enrichment
  9. 2026-08-18 13:48 UTCEPSS rescore
  10. 2026-08-17 20:32 UTCEG score recompute
  11. 2026-08-17 20:32 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 19:27 UTCEG score recompute
  14. 2026-08-16 19:27 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-15 18:16 UTCEG score recompute
  17. 2026-08-15 18:16 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 17:11 UTCEG score recompute
  20. 2026-08-14 17:11 UTCGHSA enrichment
  21. 2026-08-14 01:04 UTCEG score recompute
  22. 2026-08-14 01:04 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-12 23:59 UTCEG score recompute
  25. 2026-08-12 23:59 UTCGHSA enrichment
Show 27 more
  1. 2026-08-12 13:51 UTCEPSS rescore
  2. 2026-08-11 22:55 UTCEG score recompute
  3. 2026-08-11 22:55 UTCGHSA enrichment
  4. 2026-08-11 00:00 UTCEPSS rescore
  5. 2026-08-10 21:51 UTCGHSA enrichment
  6. 2026-08-09 20:47 UTCEG score recompute
  7. 2026-08-09 20:47 UTCGHSA enrichment
  8. 2026-08-09 13:47 UTCEPSS rescore
  9. 2026-08-08 19:43 UTCEG score recompute
  10. 2026-08-08 19:43 UTCGHSA enrichment
  11. 2026-08-08 16:37 UTCEPSS rescore
  12. 2026-08-07 18:38 UTCEG score recompute
  13. 2026-08-07 18:38 UTCGHSA enrichment
  14. 2026-08-06 17:28 UTCEG score recompute
  15. 2026-08-06 17:28 UTCGHSA enrichment
  16. 2026-08-06 13:47 UTCEPSS rescore
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-05 19:17 UTCEPSS rescore
  19. 2026-08-05 16:24 UTCGHSA enrichment
  20. 2026-08-04 15:20 UTCEG score recompute
  21. 2026-08-04 15:20 UTCGHSA enrichment
  22. 2026-08-04 15:10 UTCEPSS rescore
  23. 2026-08-04 14:49 UTCEG score recompute
  24. 2026-08-04 14:49 UTCGHSA enrichment
  25. 2026-08-03 22:21 UTCEG score recompute
  26. 2026-08-03 22:03 UTCEG score recompute
  27. 2026-08-03 22:03 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67617?
CVE-2026-67617 is a medium vulnerability published on August 3, 2026. Microweber CMS through 2.0.20 contains a stored cross-site scripting vulnerability in the content tagging system that allows admin-authenticated attackers to inject arbitrary JavaScript by submitting malicious payloads via the tagnames parameter of the GET /api/savecontentadmin endpoint, bypassing…
When was CVE-2026-67617 disclosed?
CVE-2026-67617 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67617 actively exploited?
CVE-2026-67617 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 94.2% of all scored CVEs.
What is the CVSS score of CVE-2026-67617?
CVE-2026-67617 has a CVSS v4.0 base score of 4.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-67617?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67617, 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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