CVE-2020-5502

phpBB allows CSRF

6.5 MediumFix available

CVE-2020-5502 is a medium vulnerability (CVSS 6.5) in Phpbb, published January 14, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 38th percentile. Fixed in phpbb/phpbb 3.2.9.

What does this mean?

Severity: 6.5 MediumCVSS 3.1, NVD
Exploit chance: 0.43%EPSS, 38th percentile
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: 3.2.9phpbb/phpbb +2 more

Description

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

0.43%Down 0.2 points since Apr 14, 2021

Affected products

phpbb

Affected packages

Affected packages
Package	Affected	Fixed
`phpbb/phpbb` Packagist	through 3.2.8	3.2.9
`phpbb` Bitnami	3.2.8 to 3.2.8	None known
`phpbb/phpbb` Packagist	before 3.2.9, plus listed versions 3.0.123.0.12-RC13.0.12-RC23.0.12-RC33.0.13 Show 45 moreShow less 3.0.13-PL13.0.13-RC13.0.143.0.14-RC13.1.03.1.0-RC13.1.0-RC23.1.0-RC33.1.0-RC43.1.0-RC53.1.0-RC63.1.0-a13.1.0-a23.1.0-a33.1.0-b13.1.0-b23.1.0-b33.1.0-b43.1.13.1.103.1.10-RC13.1.113.1.11-RC13.1.123.1.23.1.2-RC13.1.33.1.3-RC13.1.3-RC23.1.43.1.4-RC13.1.4-RC23.1.53.1.5-RC13.1.63.1.6-RC13.1.73.1.7-RC13.1.7-pl13.1.83.1.8-RC13.1.93.1.9-RC13.2.03.2.0-RC1	3.2.9

What each source reports

NVD Score used6.5

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: CVE-2020-5502
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-352
Updated: 2026-11-02

CVE ListNo score

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: CVE-2020-5502
Updated: 2026-11-02

EUVDEUVD-2022-2764No score

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: EUVD-2022-2764
Updated: 2026-11-03

GitHub AdvisoriesGHSA-69q7-hww4-8pjq6.5

phpBB allows CSRF

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: GHSA-69q7-hww4-8pjq
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSV6.5

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: CVE-2020-5502
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGHSA-69q7-hww4-8pjq6.5

phpBB allows CSRF

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: GHSA-69q7-hww4-8pjq
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVBIT-phpbb-2020-5502No score

phpBB 3.2.8 allows a CSRF attack that can approve pending group memberships.

Record: BIT-phpbb-2020-5502
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

This page doesn't list everything

Left out here: 21 versions. The JSON record has them.