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Fencer Vulns
low 2.4

CVE-2025-8521 json

givanz Vvveb Add Type post-types cross site scripting

published 2025-08-04 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23531

cvss
2.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

A vulnerability, which was classified as problematic, has been found in givanz Vvveb up to 1.0.5. This issue affects some unknown processing of the file /vadmin123/index.php?module=settings/post-types of the component Add Type Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.0.6 is able to address this issue. The patch is named b53c7161da606f512b7efcb392d6ffc708688d49/605a70f8729e4d44ebe272671cb1e43e3d6ae014. It is recommended to upgrade the affected component.

Patch / fix

  • givanz Vvveb 1.0.6

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • vuldb.com https://vuldb.com/?submit.625003 referenced PoC, tagged "exploit" by a source, unverified
  • hkohi.ca https://hkohi.ca/vulnerability/11 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 4.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
CNA 3.1 2.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CNA 3.0 2.4 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
CNA 2.0 3.3 AV:N/AC:L/Au:M/C:N/I:P/A:N/E:POC/RL:OF/RC:C
CNA 4.0 1.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA 3.1 2.4 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA 2.0 3.3 AV:N/AC:L/Au:M/C:N/I:P/A:N

Affected products

  • givanz Vvveb

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation
  • CWE-94 Improper Control of Generation of Code

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.