PostyBirb Plus up to 3.1.75 Submission Description Editor DescriptionInput.tsx cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in PostyBirb Plus up to 3.1.75. Affected by this issue is some unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description Editor. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2026-120190. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in PostyBirb Plus up to 3.1.75 and classified as problematic. Affected by this vulnerability is some unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description Editor. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-120190. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Upgrading to version 3.1.76 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• PostyBirb Plus

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.1.5
• 3.1.6
• 3.1.7
• 3.1.8
• 3.1.9
• 3.1.10
• 3.1.11
• 3.1.12
• 3.1.13
• 3.1.14
• 3.1.15
• 3.1.16
• 3.1.17
• 3.1.18
• 3.1.19
• 3.1.20
• 3.1.21
• 3.1.22
• 3.1.23
• 3.1.24
• 3.1.25
• 3.1.26
• 3.1.27
• 3.1.28
• 3.1.29
• 3.1.30
• 3.1.31
• 3.1.32
• 3.1.33
• 3.1.34
• 3.1.35
• 3.1.36
• 3.1.37
• 3.1.38
• 3.1.39
• 3.1.40
• 3.1.41
• 3.1.42
• 3.1.43
• 3.1.44
• 3.1.45
• 3.1.46
• 3.1.47
• 3.1.48
• 3.1.49
• 3.1.50
• 3.1.51
• 3.1.52
• 3.1.53
• 3.1.54
• 3.1.55
• 3.1.56
• 3.1.57
• 3.1.58
• 3.1.59
• 3.1.60
• 3.1.61
• 3.1.62
• 3.1.63
• 3.1.64
• 3.1.65
• 3.1.66
• 3.1.67
• 3.1.68
• 3.1.69
• 3.1.70
• 3.1.71
• 3.1.72
• 3.1.73
• 3.1.74
• 3.1.75

License

• open-source

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #1027356: PostyBirb PostyBirb Plus <= 3.1.75 Stored Cross-Site Scripting (by fifker)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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