CVE-2026-81918

MEDIUMNVD 4.84.8—
EchelonGraph scoreHIGH confidence

Score 4.8 from GitHub Security Advisory published 2026-09-11. NVD baseline CVSS 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
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: None knownExposed: 0

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

Concrete CMS below 9.5.3 is vulnerable to Stored XSS via the Date Format field in the Page Attribute Display block. A user with edit_page_contents permissions could store a payload which executes in the browser of any visitor who viewed a page where the block was configured to display a date-type attribute. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Oriol Ortiz for reporting.

CVSS v3
4.8
EG Score
4.8(high)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 18, 2026

References (1)

Vendor Advisories for CVE-2026-81918(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 24× in last 7d / 46× 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. 2026-09-25 07:15 UTCEG score recompute
  2. 2026-09-25 07:15 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 08:27 UTCEG score recompute
  5. 2026-09-24 08:27 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 09:40 UTCEG score recompute
  8. 2026-09-23 09:40 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 10:52 UTCEG score recompute
  11. 2026-09-22 10:52 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 12:04 UTCEG score recompute
  14. 2026-09-21 12:04 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 13:16 UTCEG score recompute
  17. 2026-09-20 13:16 UTCGHSA enrichment
  18. 2026-09-19 14:14 UTCEG score recompute
  19. 2026-09-19 14:14 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 15:27 UTCEG score recompute
  22. 2026-09-18 15:27 UTCGHSA enrichment
  23. 2026-09-18 11:45 UTCEG score recompute
  24. 2026-09-18 11:45 UTCGHSA enrichment
  25. 2026-09-17 12:58 UTCEG score recompute
Show 21 more
  1. 2026-09-17 12:58 UTCGHSA enrichment
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 13:50 UTCEG score recompute
  4. 2026-09-16 13:50 UTCGHSA enrichment
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 15:01 UTCGHSA enrichment
  7. 2026-09-15 12:17 UTCEG score recompute
  8. 2026-09-15 12:17 UTCGHSA enrichment
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-14 13:29 UTCEG score recompute
  12. 2026-09-14 13:29 UTCGHSA enrichment
  13. 2026-09-14 13:10 UTCEG score recompute
  14. 2026-09-14 13:10 UTCGHSA enrichment
  15. 2026-09-13 18:57 UTCEG score recompute
  16. 2026-09-13 18:57 UTCGHSA enrichment
  17. 2026-09-12 20:09 UTCEG score recompute
  18. 2026-09-12 20:09 UTCGHSA enrichment
  19. 2026-09-11 21:21 UTCEG score recompute
  20. 2026-09-11 20:29 UTCEG score recompute
  21. 2026-09-11 20:28 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81918?
CVE-2026-81918 is a medium vulnerability published on September 11, 2026. Concrete CMS below 9.5.3 is vulnerable to Stored XSS via the Date Format field in the Page Attribute Display block. A user with editpagecontents permissions could store a payload which executes in the browser of any visitor who viewed a page where the block was configured to display a date-type…
When was CVE-2026-81918 disclosed?
CVE-2026-81918 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81918 actively exploited?
CVE-2026-81918 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 85.0% of all scored CVEs.
What is the CVSS score of CVE-2026-81918?
CVE-2026-81918 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-81918?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81918, 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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