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Fencer Vulns
medium 6.1

CVE-2021-25876 json

AVideo/YouPHPTube 10.0 and prior has multiple reflected Cross Script Scripting vulnerabilities via the u parameter which allows a remote at…

published 2021-11-01 5 y ago modified 2026-07-09 4 mo ago also EUVD-2021-12756

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

AVideo/YouPHPTube 10.0 and prior has multiple reflected Cross Script Scripting vulnerabilities via the u parameter which allows a remote attacker to steal administrators' session cookies or perform actions as an administrator.

Exploit prediction

0.87% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • synacktiv.com https://www.synacktiv.com/sites/default/files/2021-01/YouPHPTube_Multiple_Vulnerabilities.pdf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.