How severe is CVE-2021-47749?

CVE-2021-47749 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-47749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47749?

CVE-2021-47749 affects Youphptube. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47749?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-47749 have an EU (EUVD) identifier?

Yes. CVE-2021-47749 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2652.

When was CVE-2021-47749 published?

CVE-2021-47749 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2021-47749

Q: What is CVE-2021-47749?

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.

CVE-2021-47749 is a medium-severity vulnerability in Youphptube with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 8.7
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2652
Weakness: CWE-22
Affected product: Youphptube
Published: 2026-01-13
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-47749?: 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.
How severe is CVE-2021-47749?: CVE-2021-47749 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-47749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47749?: CVE-2021-47749 affects Youphptube. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47749 have an EU (EUVD) identifier?: Yes. CVE-2021-47749 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2652.
When was CVE-2021-47749 published?: CVE-2021-47749 was published on 2026-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:youphptube:youphptube:*:*:*:*:*:*:*:*

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