CVE-2025-8517Public exploitNetwork attack vector

Account takeover via unrotated session identifiers

Published Aug 4, 2025 · Updated Aug 18, 2025

Session fixation in givanz Vvveb 1.0.6.1 allows attackers to hijack authenticated user or administrator sessions via a fixed cookie. The user and administrator login methods retain a client-supplied PHPSESSID after authentication instead of generating a new session identifier. Exploitation requires planting the chosen cookie before a victim logs in; reuse then grants the victim's account privileges.

CVSS severity6.3
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in givanz Vvveb 1.0.6.1 allows attackers to hijack authenticated user or administrator sessions via a fixed cookie. The user and administrator login methods retain a client-supplied PHPSESSID after authentication instead of generating a new session identifier. Exploitation requires planting the chosen cookie before a victim logs in; reuse then grants the victim's account privileges.

The record

CVE
CVE-2025-8517
Published
Aug 4, 2025
Updated
Aug 18, 2025
Vendor
givanz
Product
Vvveb
Classifications
CWE-384, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

givanz · Vvvebversion=1.0.6.1

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-384Session Fixation
T1539Steal Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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