CVE-2021-4254

MEDIUMNVD 3.56.1▲
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2022-12-19. NVD baseline CVSS 3.5; sources differ by 2.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.5Exploit: None knownExposed: 0

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

A vulnerability has been found in ctrlo lenio and classified as problematic. Affected by this vulnerability is an unknown functionality of the file views/layouts/main.tt of the component Notice Handler. The manipulation of the argument notice.notice.text leads to cross site scripting. The attack can be launched remotely. The name of the patch is aa300555343c1c081951fcb68bfb6852fbba7451. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-216211.

CVSS v3
3.5
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

December 18, 2022

Last Modified

November 21, 2024

References (4)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 45× 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 106 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
  2. 2026-07-25 14:15 UTCEPSS rescore
  3. 2026-07-24 14:15 UTCEPSS rescore
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  6. 2026-07-23 02:04 UTCEG score recompute
  7. 2026-07-22 22:51 UTCEG score recompute
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  18. 2026-07-16 11:53 UTCOSV refresh
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  1. 2026-07-11 08:25 UTCEPSS rescore
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  18. 2026-06-28 10:49 UTCOSV refresh
  19. 2026-06-28 04:54 UTCEPSS rescore
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  21. 2026-06-27 03:07 UTCEPSS rescore
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  23. 2026-06-25 13:48 UTCEPSS rescore
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  25. 2026-06-24 14:03 UTCEPSS rescore
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  27. 2026-06-23 21:31 UTCEPSS rescore
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  43. 2026-06-13 22:58 UTCEPSS rescore
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  45. 2026-06-12 23:10 UTCEPSS rescore
  46. 2026-06-11 13:58 UTCEPSS rescore
  47. 2026-06-10 22:16 UTCEPSS rescore
  48. 2026-06-10 21:17 UTCOSV refresh
  49. 2026-06-10 13:20 UTCEPSS rescore
  50. 2026-06-08 14:15 UTCEPSS rescore
  51. 2026-06-08 14:15 UTCEPSS rescore
  52. 2026-06-08 14:15 UTCEPSS rescore
  53. 2026-06-07 15:23 UTCEPSS rescore
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  55. 2026-06-06 13:46 UTCEPSS rescore
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  73. 2026-05-27 13:39 UTCEPSS rescore
  74. 2026-05-27 13:39 UTCEPSS rescore
  75. 2026-05-26 13:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2021-4254?
CVE-2021-4254 is a medium vulnerability published on December 18, 2022. A vulnerability has been found in ctrlo lenio and classified as problematic. Affected by this vulnerability is an unknown functionality of the file views/layouts/main.tt of the component Notice Handler. The manipulation of the argument notice.notice.text leads to cross site scripting. The attack…
When was CVE-2021-4254 disclosed?
CVE-2021-4254 was first published in the National Vulnerability Database on December 18, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-4254 actively exploited?
CVE-2021-4254 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 68.9% of all scored CVEs.
What is the CVSS score of CVE-2021-4254?
CVE-2021-4254 has a CVSS v3 base score of 3.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.1.
How do I remediate CVE-2021-4254?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4254, 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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