How severe is CVE-2021-47750?

CVE-2021-47750 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-47750 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47750?

CVE-2021-47750 affects Youphptube. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47750?

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

Does CVE-2021-47750 have an EU (EUVD) identifier?

Yes. CVE-2021-47750 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2653.

When was CVE-2021-47750 published?

CVE-2021-47750 was published on 2026-01-13 and last updated on 2026-06-17.

CVE-2021-47750

Q: What is CVE-2021-47750?

YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. Attackers can craft special signup URLs with embedded script tags to execute arbitrary JavaScript in victims' browsers when they access the signup page.

CVE-2021-47750 is a medium-severity vulnerability in Youphptube with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.1
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2653
Weakness: CWE-79
Affected product: Youphptube
Published: 2026-01-13
Last modified: 2026-06-17

Description

YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. Attackers can craft special signup URLs with embedded script tags to execute arbitrary JavaScript in victims' browsers when they access the signup page.

Frequently asked questions

What is CVE-2021-47750?: YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. Attackers can craft special signup URLs with embedded script tags to execute arbitrary JavaScript in victims' browsers when they access the signup page.
How severe is CVE-2021-47750?: CVE-2021-47750 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-47750 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47750?: CVE-2021-47750 affects Youphptube. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47750?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47750 have an EU (EUVD) identifier?: Yes. CVE-2021-47750 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2653.
When was CVE-2021-47750 published?: CVE-2021-47750 was published on 2026-01-13 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Youphptube

CVE-2019-5151 — Critical (CVSS 10.0): An exploitable SQL injection vulnerability exist in YouPHPTube 7.7. A specially crafted unauthenticated HTTP request…
CVE-2019-5114 — Critical (CVSS 9.9): An exploitable SQL injection vulnerability exists in the authenticated portion of YouPHPTube 7.6. Specially crafted web…
CVE-2019-18662 — Critical (CVSS 9.8): An issue was discovered in YouPHPTube through 7.7. User input passed through the live_stream_code POST parameter to…
CVE-2019-16124 — Critical (CVSS 9.8): In YouPHPTube 7.4, the file install/checkConfiguration.php has no access control, which leads to everyone being able to…
CVE-2019-5150 — High (CVSS 8.9): An exploitable SQL injection vulnerability exist in YouPHPTube 7.7. When the "VideoTags" plugin is enabled, a specially…
CVE-2019-5123 — High (CVSS 8.8): Specially crafted web requests can cause SQL injections in YouPHPTube 7.6. An attacker can send a web request with…

All CVEs affecting Youphptube →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →