Description
Directory traversal vulnerability in MoinMoin 1.5.8 and earlier allows remote attackers to overwrite arbitrary files via a .. (dot dot) in the MOIN_ID user ID in a cookie for a userform action. NOTE: this issue can be leveraged for PHP code execution via the quicklinks parameter.
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 4.0 | moin | 1.5.3-1.2etch1 | DSA-1514-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- MoinMoin 1.5.x - 'MOIND_ID' Cookie Login Bypass EDB-4957 · webapps · Jan 21, 2008 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | moin | <= 1.5.8 | — | GHSA-6766-r2rx-mfw9 |
Advisories 1
- DSA-1514-1 moin Debian Security (DSA / DLA) · Mar 9, 2026
References
- 33755 third-party-advisory
- GLSA-200803-27 vendor-advisory
- 29262 third-party-advisory
- http://hg.moinmo.in/moin/1.5/rev/e69a16b6e630
- 29010 third-party-advisory
- 20080124 MoinMoin 1.5.x MOIND_ID cookie Bug Remote Exploit mailing-list
- moinmoin-readme-file-overwrite(39837) vdb-entry
- 4957 exploit
- ADV-2008-0569 vdb-entry
- 29444 third-party-advisory
- 27404 vdb-entry
- USN-716-1 vendor-advisory
- DSA-1514 vendor-advisory