CVE-2011-3371: Multiple cross-site scripting (XSS) vulnerabilities in include/functions.php in PunBB before 1.3.6 allow remot

Q: How do I fix CVE-2011-3371?

punbb: upgrade to newer than 1.3.5. Exact commands for each OS are on this page.

Q: Is CVE-2011-3371 being exploited?

CVE-2011-3371 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-3371 affect?

CVE-2011-3371 affects punbb. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in include/functions.php in PunBB before 1.3.6 allow remote attackers to inject arbitrary web script or HTML via the (1) id, (2) form_sent, (3) csrf_token, (4) req_confirm, or (5) delete p

Q: How urgent is CVE-2011-3371?

Priority 41/100. Public exploit reference

This month

MEDIUM 4.3UPGRADE

CVE-2011-3371 is a medium-severity flaw (CVSS 4.3) affecting punbb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site scripting (XSS) vulnerabilities in include/functions.php in PunBB before 1.3.6 allow remote attackers to inject arbitrary web script or HTML via the (1) id, (2) form_sent, (3) csrf_token, (4) req_confirm, or (5) delete parameter to delete.php, the (6) id, (7) form_sent, (8) csrf_token, (9) req_message, or (10) submit parameter to edit.php, the (11) action, (12) form_sent, (13) csrf_token, (14) req_email, or (15) request_pass p

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.3% (top 16%)
CISA exploited list	No
Weakness	CWE-79
Published	2011-10-02
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: punbb

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-10-02 20:55 UTCPublished CVE record published
2026-06-16 23:33 UTCUpdated Record last modified

punbb punbb UPGRADE

Affected: <= 1.3.5 · 1.0 · 1.0 alpha · 1.0 beta1 · 1.0 beta1a · 1.0 beta2 · 1.0 beta3 · 1.0 rc1

Fixed in: newer than 1.3.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy punbb || rpm -q punbb || punbb --version

2. UPGRADE to newer than 1.3.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade punbb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade punbb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-3371?

punbb: upgrade to newer than 1.3.5. Exact commands for each OS are on this page.

Is CVE-2011-3371 being exploited?

CVE-2011-3371 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-3371 affect?

CVE-2011-3371 affects punbb. Severity is medium (CVSS 4.3). Multiple cross-site scripting (XSS) vulnerabilities in include/functions.php in PunBB before 1.3.6 allow remote attackers to inject arbitrary web script or HTML via the (1) id, (2) form_sent, (3) csrf_token, (4) req_confirm, or (5) delete p

How urgent is CVE-2011-3371?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-28968 MEDIUM 5.4 UPGRADE An issue was discovered in PunBB before 1.4.6
CVE-2010-0455 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in forum/viewtopic.php in PunBB 1.3 allows remote attackers to inject
CVE-2009-4894 MEDIUM 4.3 UPGRADE Multiple cross-site scripting (XSS) vulnerabilities in profile.php in PunBB before 1.3.4 allow remote attacker
CVE-2008-7241 MEDIUM 6.8 UPGRADE Cross-site request forgery (CSRF) vulnerability in PunBB before 1.2.17 allows remote attackers to hijack the a
CVE-2008-5435 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in moderate.php in PunBB before 1.3.1 allows remote attackers to inje

References

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