bbPress stored Cross-Site Scripting (XSS) vulnerability in the Forum creation section

published 2020-05-26 6 y ago modified 2026-06-17 4 mo ago also EUVD-2022-4737 , GHSA-p9xp-xghp-gqvp

cvss: 4.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

The bbPress plugin through 2.6.4 for WordPress has stored XSS in the Forum creation section, resulting in JavaScript execution at wp-admin/edit.php?post_type=forum (aka the Forum listing page) for all users. An administrator can exploit this at the wp-admin/post.php?action=edit URI.

Exploit prediction

1.59% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

youtube.com https://www.youtube.com/watch?v=3rXP8CGTe08 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
GitHub	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	bbpress/bbpress	<=2.6.4	no fix listed

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

youtube.com /watch?v=3rXP8CGTe08
web, exploit, third-party-advisory
codex.bbpress.org /releases/
vendor-advisory
bbpress.org /
vendor-advisory
wordpress.org /plugins/bbpress/#developers
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-13487
advisory
bbpress.org
web
codex.bbpress.org /releases
web
github.com /bbpress/bbPress
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary