gVectors wpDiscuz up to 7.6.46 wpdGetNonce User-Agent authentication spoofing

Summaryinfo

A vulnerability classified as critical has been found in gVectors wpDiscuz up to 7.6.46. The impacted element is the function wpdGetNonce. This manipulation of the argument User-Agent causes authentication spoofing. This vulnerability is tracked as CVE-2026-22199. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in gVectors wpDiscuz up to 7.6.46 and classified as critical. Affected by this vulnerability is the function wpdGetNonce. The manipulation of the argument User-Agent with an unknown input leads to a authentication spoofing vulnerability. The CWE definition for the vulnerability is CWE-290. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. As an impact it is known to affect integrity. The summary by CVE is:

wpDiscuz before 7.6.47 contains a vote manipulation vulnerability that allows attackers to manipulate comment votes by obtaining fresh nonces and bypassing rate limiting through client-controlled headers. Attackers can vary User-Agent headers to reset rate limits, request nonces from the unauthenticated wpdGetNonce endpoint, and vote multiple times using IP rotation or reverse proxy header manipulation.

The weakness was disclosed by Scott Moore. The advisory is shared at wordpress.org. This vulnerability is known as CVE-2026-22199 since 01/06/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

Upgrading to version 7.6.47 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• gVectors

Name

• wpDiscuz

Version

• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.3
• 7.6.4
• 7.6.5
• 7.6.6
• 7.6.7
• 7.6.8
• 7.6.9
• 7.6.10
• 7.6.11
• 7.6.12
• 7.6.13
• 7.6.14
• 7.6.15
• 7.6.16
• 7.6.17
• 7.6.18
• 7.6.19
• 7.6.20
• 7.6.21
• 7.6.22
• 7.6.23
• 7.6.24
• 7.6.25
• 7.6.26
• 7.6.27
• 7.6.28
• 7.6.29
• 7.6.30
• 7.6.31
• 7.6.32
• 7.6.33
• 7.6.34
• 7.6.35
• 7.6.36
• 7.6.37
• 7.6.38
• 7.6.39
• 7.6.40
• 7.6.41
• 7.6.42
• 7.6.43
• 7.6.44
• 7.6.45
• 7.6.46

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion