CVE-2021-31531VulnerabilityPublished 29 Jun 2021Updated 30 May 2025

CVE-2021-31531: n/a

Source CVE Database V5

Not known to be exploited · fixed in 10521 : patch affected systems soon.

Data as of 26 Oct 2026, 06:26 UTC

Severity

High

Rated High by the CNA (mitre) · No CVSS score from NVD or the CNA

EPSS: 2.3% chance of exploitation in 30 days – higher than 83% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 10521

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Jun 2021
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
n/a n/a	Affected <10521	Fixed in 10521

AI-suggested

Organizations should immediately verify their ServiceDesk Plus MSP version and upgrade to version 10521 or later, where the vulnerability is patched. If immediate upgrade is not feasible, implement strict network segmentation to limit the server's ability to make outbound requests to untrusted or internal network resources. Employ web application firewalls (WAFs) with rules to detect and block SSRF attack patterns targeting the ServiceDesk Plus MSP interface. Conduct thorough input validation and sanitization on any user-supplied URLs or parameters that trigger server-side requests. Monitor logs for unusual outbound requests from the ServiceDesk Plus server, which may indicate attempted exploitation. Additionally, restrict access to the ServiceDesk Plus MSP interface to trusted IP addresses and enforce strong authentication and authorization controls to reduce the attack surface. Regularly review and update incident response plans to include scenarios involving SSRF exploitation.

Description

Zoho ManageEngine ServiceDesk Plus MSP before 10521 is vulnerable to Server-Side Request Forgery (SSRF).

Impact

For European organizations, this SSRF vulnerability poses a considerable risk, especially for MSPs and enterprises relying on Zoho ManageEngine ServiceDesk Plus MSP for IT service management. Exploitation could allow attackers to access internal resources, potentially leading to data breaches involving sensitive customer or operational data. It could also enable lateral movement within corporate networks, increasing the risk of further compromise such as ransomware deployment or espionage. Given the GDPR regulatory environment in Europe, any data breach resulting from exploitation could lead to significant legal and financial penalties. Additionally, disruption of IT service management platforms can impact business continuity and operational efficiency. The vulnerability's exploitation could also undermine trust in managed service providers, which are critical for many European SMEs and large organizations.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2025, 15:29 UTC

Technical details

References

Community reviews

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