Description
wp-admin/upgrade.php in WordPress, probably 2.6.x, allows remote attackers to upgrade the application, and possibly cause a denial of service (application outage), via a direct request.
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 | wordpress | 2.8.3-1 | — |
| Debian 13 | wordpress | 2.8.3-1 | — |
| Debian 12 | wordpress | 2.8.3-1 | — |
| Debian 5.0 | wordpress | 2.5.1-11+lenny1 | DSA-1871-1 |
| Debian 4.0 | wordpress | 2.0.10-1etch4 | DSA-1871-2, DSA-1871-1 |
Advisories 2
- DSA-1871-2 wordpress - regression fix Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1871-1 wordpress - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- wordpress-upgrade-sec-bypass(50384) vdb-entry
- DSA-1871 vendor-advisory
- 20081222 [ISecAuditors Security Advisories] Wordpress is vulnerable to an unauthorized upgrade and XSS mailing-list