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CSRF privilege escalation in OpenProject /users/:id admin parameter

IdentifiersCVE-2026-52784CWE-352

CVE-2026-52784 is a cross-site request forgery vulnerability in OpenProject affecting versions prior to 17.3.3 and 17.4.1. The flaw is present in requests to the /users/:id endpoint, where the POST parameter "user[admin]" can be manipulated via a forged cross-site request. Based on the provided context, the issue allows an attacker to induce a victim's browser to submit a state-changing request that modifies the target user's administrative status. The vulnerable condition is fixed in OpenProject 17.3.3 and 17.4.1.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause unauthorized privilege changes by setting or altering the "user[admin]" value for a user record through the /users/:id endpoint. In practice, this can result in privilege escalation to administrator for the targeted account or unauthorized modification of administrative rights, leading to high integrity impact and potentially high confidentiality impact through subsequent administrative access. No direct availability impact is indicated in the provided context.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting access to OpenProject to trusted users and networks, minimizing active administrator sessions, and enforcing operational controls that reduce the chance of administrators visiting untrusted sites while authenticated. However, these are only temporary risk-reduction measures; the definitive mitigation is to upgrade to a fixed version.

Remediation

Patch, then assume compromise.

Upgrade OpenProject to version 17.3.3, 17.4.1, or a later vendor-fixed release. Apply the vendor-provided security patches associated with these releases. Because the issue is fixed in those versions, updating to a non-vulnerable release is the primary remediation.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

7 SOURCESView more in app
What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-52784
NVD
nvd.nist.gov/vuln/detail/CVE-2026-52784
MITRE CWE · CWE-352
cwe.mitre.org