CVE-2021-47749

MEDIUMNVD 5.56.2▲
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory (severity: HIGH) published 2026-01-14. NVD baseline CVSS 5.5; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 5.5Exploit: Elevated riskExposed: 0

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

YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to access arbitrary files by manipulating the 'lang' parameter in GET requests. Attackers can exploit the path traversal flaw in locale/function.php to include and view PHP files outside the intended directory by using directory traversal sequences.

CVSS v3
5.5
EG Score
6.2(medium)
EG Risk
59(Attend)
EG Risk 59/100SSVC: Attend

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
Severity62% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

January 13, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 8, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

YouPHPTube<= 7.8 - Multiple Vulnerabilities - PHP webapps Exploit

https://www.exploit-db.com/exploits/51101
generic

YouPHPTube <= 7.8 - Directory Traversal | Advisories | VulnCheck

https://www.vulncheck.com/advisories/youphptube-directory-traversal
generic

YouPHPTube

https://web.archive.org/web/20170506141644/https://www.youphptube.com/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 29× 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 162 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-47749?
CVE-2021-47749 is a medium vulnerability published on January 13, 2026. YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to access arbitrary files by manipulating the 'lang' parameter in GET requests. Attackers can exploit the path traversal flaw in locale/function.php to include and view PHP files outside the…
When was CVE-2021-47749 disclosed?
CVE-2021-47749 was first published in the National Vulnerability Database on January 13, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-47749 actively exploited?
CVE-2021-47749 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 21.8% of all scored CVEs.
What is the CVSS score of CVE-2021-47749?
CVE-2021-47749 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.2.
How do I remediate CVE-2021-47749?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-47749, 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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