CVE-2018-10580: The "Latest Posts on Profile" plugin 1.1 for MyBB has XSS because there is an added section in a user profile

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MEDIUM 5.4DOWNGRADE

CVE-2018-10580 is a medium-severity flaw (CVSS 5.4) affecting latest posts on profile. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The "Latest Posts on Profile" plugin 1.1 for MyBB has XSS because there is an added section in a user profile that displays that user's most recent posts without sanitizing the tsubject (aka thread subject) field.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-79
Published	2018-05-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: latest posts on profile project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-05-11 14:29 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

latest posts on profile project latest posts on profile DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy latest-posts-on-profile || rpm -q latest-posts-on-profile || latest-posts-on-profile --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison latest-posts-on-profile sudo apt install latest-posts-on-profile=<VERSION_BEFORE_1.1> sudo apt-mark hold latest-posts-on-profile

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list latest-posts-on-profile sudo dnf downgrade latest-posts-on-profile-<VERSION_BEFORE_1.1> sudo dnf versionlock add latest-posts-on-profile

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: MyBB Latest Posts on Profile Plugin 1.1 - Cross-Site Scripting

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-2018-10580?

latest posts on profile: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-10580 being exploited?

CVE-2018-10580 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-2018-10580 affect?

CVE-2018-10580 affects latest posts on profile. Severity is medium (CVSS 5.4). The "Latest Posts on Profile" plugin 1.1 for MyBB has XSS because there is an added section in a user profile that displays that user's most recent posts without sanitizing the tsubject (aka thread subject) field.

How urgent is CVE-2018-10580?

Priority 43/100. Public exploit reference

References

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