The login page of Revive Adserver v5.4.1 is vulnerable to brute force attacks.

published 2023-04-14 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-30549

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

The login page of Revive Adserver v5.4.1 is vulnerable to brute force attacks. NOTE: The vendor's position is that this is effectively mitigated by rate limits and password-quality features.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-07-05)

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

googleinformationsworld.blogspot.com https://googleinformationsworld.blogspot.com/2023/04/revive-adserver-541-vulnerable-to-brute.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness

CWE-307 Improper Restriction of Excessive Authentication Attempts

References

googleinformationsworld.blogspot.com /2023/04/revive-adserver-541-vulnerable-to-brute.html
exploit, third-party-advisory
esecforte.com /login-page-brute-force-attack/
seclists.org /fulldisclosure/2024/Apr/27
mailing-list
revive-adserver.com /security/response-to-cve-2023-26756/

Sources

CVE List CVE-2023-26756
NVD CVE-2023-26756

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.

Summary