Description
LemonLDAP::NG before 1.9.20 has an XML External Entity (XXE) issue when submitting a notification to the notification server. By default, the notification server is not enabled and has a "deny all" rule.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lemonldap-ng | 2.0.0+ds-1 | — |
| Debian 13 | lemonldap-ng | 2.0.0+ds-1 | — |
| Debian 12 | lemonldap-ng | 2.0.0+ds-1 | — |
| Debian 8 | lemonldap-ng | 1.3.3-1+deb8u2 | DLA-1844-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | lemonldap-ng | No fix yet | — |
| Ubuntu 16.04 LTS | lemonldap-ng | No fix yet | — |
Advisories 1
- DLA-1844-1 lemonldap-ng - security update Debian Security (DSA / DLA) · Mar 9, 2026