CVE-2003-0484: Cross-site scripting (XSS) vulnerability in viewtopic.php for phpBB allows remote attackers to insert arbitrar

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MEDIUM 6.8MITIGATE

CVE-2003-0484 is a medium-severity flaw (CVSS 6.8) affecting phpbb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in viewtopic.php for phpBB allows remote attackers to insert arbitrary web script via the topic_id parameter.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Published	2003-08-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: phpbb group

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

Am I affected?

Timeline

2003-08-07 04:00 UTCPublished CVE record published
2026-06-16 22:02 UTCUpdated Record last modified

phpbb group phpbb MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

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

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2003-0484?

phpbb: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2003-0484 being exploited?

CVE-2003-0484 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-2003-0484 affect?

CVE-2003-0484 affects phpbb. Severity is medium (CVSS 6.8). Cross-site scripting (XSS) vulnerability in viewtopic.php for phpBB allows remote attackers to insert arbitrary web script via the topic_id parameter.

How urgent is CVE-2003-0484?

Priority 41/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-29199 HIGH 8.1 UPGRADE phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning
CVE-2025-70811 MEDIUM 4.3 DOWNGRADE Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary
CVE-2025-70810 HIGH 8.8 DOWNGRADE Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary
CVE-2023-5917 LOW 2.4 UPGRADE A vulnerability, which was classified as problematic, has been found in phpBB up to 3.3.10
CVE-2020-8226 MEDIUM 5.8 UPGRADE A vulnerability exists in phpBB <v3.2.10 and <v3.3.1 which allowed remote image dimensions check to be used to

References

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