Horde Groupware Webmail Edition through 5.2.22 allows XSS via an admin/user.php?form=update_f&user_name= or admin/user.php?form=remove_f&us…

published 2019-10-24 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-3746

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

Horde Groupware Webmail Edition through 5.2.22 allows XSS via an admin/user.php?form=update_f&user_name= or admin/user.php?form=remove_f&user_name= or admin/config/diff.php?app= URI.

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

numanozdemir.com https://numanozdemir.com/respdisc/horde/horde.mp4 referenced PoC, tagged "exploit" by a source, unverified
numanozdemir.com https://numanozdemir.com/respdisc/horde/horde.txt referenced PoC, tagged "exploit" by a source, unverified
packetstormsecurity.com https://packetstormsecurity.com/files/152975/Horde-Webmail-5.2.22-XSS-CSRF-SQL-Injection-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
exploit-db.com https://www.exploit-db.com/exploits/46903 referenced PoC, tagged "exploit" by a source, unverified
cxsecurity.com https://cxsecurity.com/issue/WLB-2019050199 referenced PoC, tagged "exploit" by a source, unverified
bugs.horde.org https://bugs.horde.org/ticket/14926 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/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

numanozdemir.com /respdisc/horde/horde.mp4
exploit, third-party-advisory
numanozdemir.com /respdisc/horde/horde.txt
exploit, third-party-advisory
packetstormsecurity.com /files/152975/Horde-Webmail-5.2.22-XSS-CSRF-SQL-Injection-Code-Execution.html
exploit, third-party-advisory, vdb-entry
exploit-db.com /exploits/46903
exploit, third-party-advisory, vdb-entry
cxsecurity.com /issue/WLB-2019050199
exploit, third-party-advisory
bugs.horde.org /ticket/14926
exploit, issue-tracking, vendor-advisory

Sources

CVE List CVE-2019-12094
NVD CVE-2019-12094

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