CVE-2018-25247: MyBB Like Plugin 3.0.0 contains a stored cross-site scripting vulnerability

Q: How do I fix CVE-2018-25247?

thankyou\/like system: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2018-25247 being exploited?

CVE-2018-25247 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-2018-25247 affect?

CVE-2018-25247 affects thankyou\/like system. Severity is medium (CVSS 6.1). MyBB Like Plugin 3.0.0 contains a stored cross-site scripting vulnerability. Authenticated attackers can inject script payloads into post or thread subjects; when other users view a profile that displays the attacker's liked posts, the unsa

Q: How urgent is CVE-2018-25247?

Priority 30/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2018-25247 is a medium-severity flaw (CVSS 6.1) affecting thankyou\/like system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MyBB Like Plugin 3.0.0 contains a stored cross-site scripting vulnerability. Authenticated attackers can inject script payloads into post or thread subjects; when other users view a profile that displays the attacker's liked posts, the unsanitized subject is rendered, executing the script in the viewer's browser.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-04-04
Last modified	2026-07-21

Publisher (CNA): VulnCheck · Vendor: mybb

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-04 14:16 UTCPublished CVE record published
2026-07-21 07:10 UTCUpdated Record last modified

mybb thankyou\/like system UPGRADE

Affected: <= 3.0.0

Fixed in: newer than 3.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy thankyoulike-system || rpm -q thankyoulike-system || thankyoulike-system --version

2. UPGRADE to newer than 3.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade thankyoulike-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade thankyoulike-system

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-2018-25247?

thankyou\/like system: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Is CVE-2018-25247 being exploited?

CVE-2018-25247 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-2018-25247 affect?

CVE-2018-25247 affects thankyou\/like system. Severity is medium (CVSS 6.1). MyBB Like Plugin 3.0.0 contains a stored cross-site scripting vulnerability. Authenticated attackers can inject script payloads into post or thread subjects; when other users view a profile that displays the attacker's liked posts, the unsa

How urgent is CVE-2018-25247?

Priority 30/100. Public exploit reference

References

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