CVE-2021-4274

LOWNVD 3.56.1▲
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2022-12-21. NVD baseline CVSS 3.5; sources differ by 2.6.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
3.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 3.5Exploit: NoneExposed: 0

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

A vulnerability, which was classified as problematic, has been found in sileht bird-lg. This issue affects some unknown processing of the file templates/layout.html. The manipulation of the argument request_args leads to cross site scripting. The attack may be initiated remotely. The name of the patch is ef6b32c527478fefe7a4436e10b96ee28ed5b308. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-216479.

CVSS v3
3.5
EG Score
6.1(medium)
EPSS
39.5%
KEV
Not listed

Published

December 21, 2022

Last Modified

November 21, 2024

References (6)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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. 2026-07-11 08:25 UTCEPSS rescore
  2. 2026-07-09 19:07 UTCEPSS rescore
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  19. 2026-06-28 14:05 UTCEPSS rescore
  20. 2026-06-28 10:49 UTCOSV refresh
  21. 2026-06-28 04:54 UTCEPSS rescore
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  1. 2026-06-25 13:48 UTCEPSS rescore
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  4. 2026-06-23 21:31 UTCEPSS rescore
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  6. 2026-06-22 14:24 UTCEPSS rescore
  7. 2026-06-21 14:55 UTCEPSS rescore
  8. 2026-06-21 01:58 UTCEPSS rescore
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  10. 2026-06-19 19:24 UTCEPSS rescore
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  22. 2026-06-12 23:10 UTCEPSS rescore
  23. 2026-06-11 13:58 UTCEPSS rescore
  24. 2026-06-10 22:16 UTCEPSS rescore
  25. 2026-06-10 21:17 UTCOSV refresh
  26. 2026-06-10 13:20 UTCEPSS rescore
  27. 2026-06-08 14:15 UTCEPSS rescore
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  30. 2026-06-07 15:23 UTCEPSS rescore
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  44. 2026-05-31 22:29 UTCEPSS rescore
  45. 2026-05-31 00:15 UTCEPSS rescore
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  47. 2026-05-29 13:42 UTCEPSS rescore
  48. 2026-05-28 13:43 UTCEPSS rescore
  49. 2026-05-28 13:43 UTCEPSS rescore
  50. 2026-05-27 13:39 UTCEPSS rescore
  51. 2026-05-27 13:39 UTCEPSS rescore
  52. 2026-05-26 13:43 UTCEPSS rescore
  53. 2026-05-26 13:42 UTCEPSS rescore
  54. 2026-05-26 07:17 UTCEPSS rescore
  55. 2026-05-26 07:17 UTCEPSS rescore
  56. 2026-05-25 10:06 UTCEG score recompute
  57. 2026-05-25 10:06 UTCGHSA enrichment
  58. 2026-05-24 01:21 UTCOSV refresh

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-4274?
CVE-2021-4274 is a low vulnerability published on December 21, 2022. A vulnerability, which was classified as problematic, has been found in sileht bird-lg. This issue affects some unknown processing of the file templates/layout.html. The manipulation of the argument request_args leads to cross site scripting. The attack may be initiated remotely. The name of the…
When was CVE-2021-4274 disclosed?
CVE-2021-4274 was first published in the National Vulnerability Database on December 21, 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-2021-4274 actively exploited?
CVE-2021-4274 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-4274?
CVE-2021-4274 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-2021-4274?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-4274, 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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