CVE-2026-67617

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-08-04. A secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 0.3%CVSS: 4.8Exploit: Elevated riskExposed services: Not assessed

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

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
4.8MEDIUMmedium confidence
EG Risk
38
EG Risk 38/100CISA 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
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 3, 2026

Last Modified

September 10, 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 14× in last 7d / 63× 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.

Showing the most recent 100 of 150 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 06:17 UTCEG score recompute
  3. 2026-10-04 06:17 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-02 17:56 UTCEPSS rescore
  6. 2026-10-02 10:16 UTCEG score recompute
  7. 2026-10-02 10:16 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 02:31 UTCEG score recompute
  10. 2026-10-01 02:31 UTCGHSA enrichment
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-29 06:30 UTCEG score recompute
  13. 2026-09-29 06:30 UTCGHSA enrichment
  14. 2026-09-28 13:52 UTCEPSS rescore
  15. 2026-09-27 18:13 UTCEG score recompute
  16. 2026-09-27 18:13 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-25 07:13 UTCEG score recompute
  20. 2026-09-25 07:13 UTCGHSA enrichment
  21. 2026-09-24 05:54 UTCEG score recompute
  22. 2026-09-24 05:54 UTCGHSA enrichment
  23. 2026-09-23 17:54 UTCEPSS rescore
  24. 2026-09-23 04:47 UTCEG score recompute
  25. 2026-09-23 04:47 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 03:41 UTCEG score recompute
  2. 2026-09-22 03:40 UTCGHSA enrichment
  3. 2026-09-20 20:55 UTCEG score recompute
  4. 2026-09-20 20:55 UTCGHSA enrichment
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-19 13:32 UTCEG score recompute
  7. 2026-09-19 13:32 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 08:07 UTCEG score recompute
  10. 2026-09-18 08:07 UTCGHSA enrichment
  11. 2026-09-17 07:02 UTCEG score recompute
  12. 2026-09-17 07:02 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:18 UTCEG score recompute
  15. 2026-09-16 05:18 UTCGHSA enrichment
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 01:47 UTCGHSA enrichment
  18. 2026-09-14 00:40 UTCEG score recompute
  19. 2026-09-14 00:40 UTCGHSA enrichment
  20. 2026-09-12 23:35 UTCEG score recompute
  21. 2026-09-12 23:35 UTCGHSA enrichment
  22. 2026-09-11 22:06 UTCEG score recompute
  23. 2026-09-11 22:06 UTCGHSA enrichment
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 09:37 UTCEPSS rescore
  26. 2026-09-10 21:00 UTCEG score recompute
  27. 2026-09-10 21:00 UTCGHSA enrichment
  28. 2026-09-10 07:47 UTCGHSA enrichment
  29. 2026-09-09 06:42 UTCEG score recompute
  30. 2026-09-09 06:42 UTCGHSA enrichment
  31. 2026-09-08 22:01 UTCEPSS rescore
  32. 2026-09-07 18:46 UTCEG score recompute
  33. 2026-09-07 18:46 UTCGHSA enrichment
  34. 2026-09-07 16:01 UTCEPSS rescore
  35. 2026-09-06 13:47 UTCEPSS rescore
  36. 2026-09-06 12:27 UTCEG score recompute
  37. 2026-09-06 12:27 UTCGHSA enrichment
  38. 2026-09-05 15:31 UTCEPSS rescore
  39. 2026-09-05 11:23 UTCEG score recompute
  40. 2026-09-05 11:23 UTCGHSA enrichment
  41. 2026-09-04 10:15 UTCEG score recompute
  42. 2026-09-04 10:15 UTCGHSA enrichment
  43. 2026-09-04 05:07 UTCEPSS rescore
  44. 2026-09-03 08:54 UTCEG score recompute
  45. 2026-09-03 08:54 UTCGHSA enrichment
  46. 2026-09-02 14:12 UTCEPSS rescore
  47. 2026-09-02 07:47 UTCEG score recompute
  48. 2026-09-02 07:47 UTCGHSA enrichment
  49. 2026-09-01 13:54 UTCEPSS rescore
  50. 2026-09-01 04:40 UTCEPSS rescore
  51. 2026-09-01 00:31 UTCGHSA enrichment
  52. 2026-08-30 23:00 UTCEG score recompute
  53. 2026-08-30 23:00 UTCGHSA enrichment
  54. 2026-08-30 19:17 UTCEPSS rescore
  55. 2026-08-30 01:22 UTCEPSS rescore
  56. 2026-08-29 21:55 UTCEG score recompute
  57. 2026-08-29 21:55 UTCGHSA enrichment
  58. 2026-08-28 21:42 UTCEPSS rescore
  59. 2026-08-27 08:29 UTCEG score recompute
  60. 2026-08-27 08:29 UTCGHSA enrichment
  61. 2026-08-26 14:47 UTCEPSS rescore
  62. 2026-08-26 05:24 UTCEG score recompute
  63. 2026-08-26 05:24 UTCGHSA enrichment
  64. 2026-08-25 13:49 UTCEPSS rescore
  65. 2026-08-25 04:12 UTCEG score recompute
  66. 2026-08-25 04:12 UTCGHSA enrichment
  67. 2026-08-24 03:07 UTCGHSA enrichment
  68. 2026-08-23 02:01 UTCEG score recompute
  69. 2026-08-23 02:01 UTCGHSA enrichment
  70. 2026-08-23 00:19 UTCEPSS rescore
  71. 2026-08-22 00:57 UTCEG score recompute
  72. 2026-08-22 00:57 UTCGHSA enrichment
  73. 2026-08-21 23:49 UTCEPSS rescore
  74. 2026-08-20 23:53 UTCEG score recompute
  75. 2026-08-20 23:53 UTCGHSA enrichment

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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 on August 3, 2026, with the most recent update on September 10, 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 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67617?
CVE-2026-67617 has a CVSS base score of 4.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67617?
No fix for CVE-2026-67617 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-67617 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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