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Fencer Vulns
medium 5.4

CVE-2022-26874 json

lib/Horde/Mime/Viewer/Ooo.php in Horde Mime_Viewer before 2.2.4 allows XSS via an OpenOffice document, leading to account takeover in Horde…

published 2022-03-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-31423

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

lib/Horde/Mime/Viewer/Ooo.php in Horde Mime_Viewer before 2.2.4 allows XSS via an OpenOffice document, leading to account takeover in Horde Groupware Webmail Edition. This occurs after XSLT rendering.

Patch / fix

  • horde horde_mime_viewer 2.2.4
  • php-horde-mime-viewer Debian 12 2.2.4+debian0-1

debian advisories DEBIAN-CVE-2022-26874

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • blog.sonarsource.com https://blog.sonarsource.com/horde-webmail-account-takeover-via-email/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

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.