inc/plugins/thankyoulike.php in the Eldenroot Thank You/Like plugin before 3.1.0 for MyBB allows XSS via a post or thread subject.

published 2018-08-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6770

cvss: 6.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.7%; EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits: 1; Exploit-DB

Patch / fix

fixed in 1 links 1

thank_you/like_project thank_you/like 3.1.0

github.com/mybbgroup/MyBB_Thank-you-like-plugin#199 pull request

Timeline

2018-08-10 First public exploit (EDB-45178)
2018-08-14 Published

Exploit prediction

3.68% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-45178 MyBB Thank You/Like Plugin 3.0.0 - Cross-Site Scripting webapps, 2018-08-10
packetstormsecurity.com http://packetstormsecurity.com/files/148871/MyBB-Thank-You-Like-3.0.0-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /mybbgroup/MyBB_Thank-you-like-plugin/pull/199
patch, third-party-advisory
exploit-db.com /exploits/45178/
exploit, third-party-advisory, vdb-entry
packetstormsecurity.com /files/148871/MyBB-Thank-You-Like-3.0.0-Cross-Site-Scripting.html
exploit, third-party-advisory, vdb-entry
community.mybb.com /mods.php?action=changelog&pid=360
vendor-advisory

Sources

CVE List CVE-2018-14888
NVD CVE-2018-14888

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary