CVE-2009-4813

medium

Published 2010-04-27 · Modified 2026-04-29

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.3

Description

Cross-site scripting (XSS) vulnerability in myps.php in MyBB (aka MyBulletinBoard) 1.4.10 allows remote attackers to inject arbitrary web script or HTML via the username parameter in a donate action.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-33439 webapps php verified

Steven Abbagnaro · 2009-12-24

MyBB 1.4.10 - 'myps.php' Cross-Site Scripting

Source code queued for fetch — refresh in a moment.

Application impact

Vendor	Product	Versions	Fixed
mybb	mybb	`1.4.10`

References

CWEs

CWE-79

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.