CVE-2006-6421

mediumpriority · track · 39EPSS 0.156 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

15.6% (97th) EPSS

CVSS 6 · medium

Is it mine?

33 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Cross-site scripting (XSS) vulnerability in the private message box implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated users to inject arbitrary web script or HTML via the "Message body" field in a message to a non-existent user.

cvss

Technical severity, 0–10. One row per scoring source.

6.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06mediumAV:N/AC:M/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 6.8 · impact 6.4

v2.05.4mediumAV:N/AC:M/Au:S/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-29442phpBB 2.0.21 - 'privmsg.php' HTML Injectionfunctional · exploit_db

affected products (33)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
phpbb group phpbb= 2.0nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.0nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.1nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.10nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.11nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.12nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.13nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.14nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.15nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.16nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.17nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.18nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.19nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.2nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.20nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.21nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.3nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.4nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*
phpbb group phpbb= 2.0.5nvdUScpe:2.3:a:phpbb_group:phpbb:*:*:*:*:*:*:*:*

showing 20 of 33

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2006-12-10modified 2026-06-16

references (20)

External citations — patches, advisories, analysis.

scry

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