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CVE-2026-120190— PostyBirb Plus Submission Description Editor DescriptionInput.tsx cross site scripting

Quick assessment

Affected

n/a PostyBirb Plus

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 PostyBirb Plus 3.1.75 及更早版本中发现了一个安全漏洞。该漏洞影响组件"Submission Description Editor"中文件的某个未知功能。攻击者可通过操纵该功能实施跨站脚本攻击（XSS）。此攻击可远程发起，且利用代码已公开，可能被用于实际攻击。升级到版本 3.1.76 可修复此问题，相关补丁提交哈希为。建议尽快升级受影响的组件。

CVSS 3.5 · Low Updated Nov 01, 2026

Possible ATT&CK Techniques 2 AI

T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

Affected Version Matrix 77

Vendor	Product	Version Range	Status
n/a	PostyBirb Plus	`3.1.0`	affected
		`3.1.1`	affected
		`3.1.2`	affected
		`3.1.3`	affected
		`3.1.4`	affected
		`3.1.5`	affected
		`3.1.6`	affected
		`3.1.7`	affected
… +69 more rows

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Vulnerability Title

PostyBirb Plus Submission Description Editor DescriptionInput.tsx cross site scripting

Source: CVE Program / CVE List V5

Vulnerability Description

A security flaw has been discovered in PostyBirb Plus up to 3.1.75. Affected by this vulnerability is an unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description Editor. The manipulation results in cross site scripting. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. Upgrading to version 3.1.76 addresses this issue. The patch is identified as 6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4. It is advisable to upgrade the affected component.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

在Web页面生成时对输入的转义处理不恰当(跨站脚本)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
-	PostyBirb Plus	3.1.0	`cpe:2.3:a:postybirb_plus:postybirb_plus::::::::`

II. Public POCs for CVE-2026-120190

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-120190

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Other References for CVE-2026-120190 (9)

https://github.com/mvdicarlo/postybirb-plus/issues/504 issue-tracking
https://github.com/mvdicarlo/postybirb-plus/pull/506 issue-tracking patch
https://github.com/mvdicarlo/postybirb-plus/commit/6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4 patch
https://github.com/mvdicarlo/postybirb-plus/releases/tag/v3.1.76 patch
https://github.com/user-attachments/files/32685547/report.md exploit
https://vuldb.com/cve/CVE-2026-120190 third-party-advisory
https://vuldb.com/vuln/429529/cti signature permissions-required
https://vuldb.com/submit/1027356 third-party-advisory
https://vuldb.com/vuln/429529 vdb-entry

https://www.cve.org/CVERecord?id=CVE-2026-120190

Same Patch Batch · n/a · 2026-11-01 · 4 CVEs total

CVE-2026-120191	7.3 HIGH	Presenton API missing authentication
CVE-2026-120192	5.3 MEDIUM	Presenton Desktop Authentication Middleware app_data information disclosure
CVE-2026-120218	3.5 LOW	Typemill SvgSanitizer.php saveImage cross site scripting

IV. Related Vulnerabilities

Same vendor: n/a

Same weakness: CWE-79